400 Words Must Have - TOEFL 10 USGUIDE 1. abandon [ 'bænd nə ə ] 400 Words Must Have - TOEFL 10 USGUIDE 2. adversely ['ædv :sli]ə adversity (n) adverse (a) 400 Words Must Have - TOEFL 10 USGUIDE 3. aggregate ['ægrigit] aggregate (v) aggregate (n) 400 Words Must Have - TOEFL 10 USGUIDE 4. cultivation [,k lti'vei n]ʌ ∫ cultivate (v) 400 Words Must Have - TOEFL 10 USGUIDE 5. fertilize ['f :tilaiz]ə fertilizer (n); fertilization (n) 400 Words Must Have - TOEFL 10 USGUIDE 6. intensify [in'tensifai] intensification (n); intense (adj) 400 Words Must Have - TOEFL 10 USGUIDE 7. irrigation [,iri'gei n]∫ irrigate (v) 400 Words Must Have - TOEFL 10 USGUIDE 8. obtain [ b'tein]ə 400 Words Must Have - TOEFL 10 USGUIDE 9. photosynthesis [,foutou'sin sis]θə photosynthesize (v) 400 Words Must Have - TOEFL 10 USGUIDE 10. precipitation [pri,sipi'tei n]∫ 400 Words Must Have - TOEFL 10 USGUIDE 11. anticipate [æn'tisipeit] anticipation (n); anticipatory (adj) 400 Words Must Have - TOEFL 10 USGUIDE 12. catastrophic [,kæt 'str fik]ə ɔ catastrophe (n) catastrophically (adv) 400 Words Must Have - TOEFL 10 USGUIDE 13. collide [k 'laid]ə collision (n) 400 Words Must Have - TOEFL 10 USGUIDE 14. eruption [i'r p n]ʌ ∫ erupt v 400 Words Must Have - TOEFL 10 USGUIDE 15. famine ['fæmin] 400 Words Must Have - TOEFL 10 USGUIDE 16. flood [fl d]ʌ flood v 400 Words Must Have - TOEFL 10 USGUIDE 17. impact ['impækt] Impact (v) 400 Words Must Have - TOEFL 10 USGUIDE 18. persevere [,p :si'vi (r)]ə ə persist (v); perseverance (n) persistent /perseverant (adj) 400 Words Must Have - TOEFL 10 USGUIDE 19. plunge [plʌndʒ] Plunge (n) 400 Words Must Have - TOEFL 10 USGUIDE 20. unleash [ʌn' l i : ∫ ] 400 Words Must Have - TOEFL 10 USGUIDE 21. adapt [ə'dæpt] adaptation (n) adapter (n) adaptable (adj) 400 Words Must Have - TOEFL 10 USGUIDE 22. diverse [dai ' və :s ] diversify (v) diversity (n) diversification (n) 400 Words Must Have - TOEFL 10 USGUIDE 23. evolve [ i ' vɔl v] evolution (n) evolutionist (n) 400 Words Must Have - TOEFL 10 USGUIDE 24. feature [ ' f i : t ∫ ə] feature (v) 400 Words Must Have - TOEFL 10 USGUIDE 25. generation [,dʒenə'rei∫n] generational (adj) 400 Words Must Have - TOEFL 10 USGUIDE 26. inherent [ in'h iə rənt] inherently (adv) 400 Words Must Have - TOEFL 10 USGUIDE 27. migration [mai 'grei∫n] migrate (v) migrant (n) migratory (adj) 400 Words Must Have - TOEFL 10 USGUIDE 28. physical [' f i z ik l ] physically (adv) 400 Words Must Have - TOEFL 10 USGUIDE 29. process [ 'prouses] proceed (v) process (v) 400 Words Must Have - TOEFL 10 USGUIDE 30. survive [sə 'vaiv] survivor (n) survival (n) 400 Words Must Have - TOEFL 10 USGUIDE 31. constraint [kən'stre int ] constrain (v) 400 Words Must Have - TOEFL 10 USGUIDE 32. contamination [kən,tæmi'nei∫n] contaminate (v) contaminant (n) 400 Words Must Have - TOEFL 10 USGUIDE 33. deplete [di ' p l i : t ] depletion (n) 400 Words Must Have - TOEFL 10 USGUIDE 34. dispose of [dis 'pouzd] disposal (n) disposable (adj) 400 Words Must Have - TOEFL 10 USGUIDE 35. elementally [,e l i 'ment l ] element (n) elemental (adj) 400 Words Must Have - TOEFL 10 USGUIDE 36. emission [ i 'mi∫n] emit (v) 400 Words Must Have - TOEFL 10 USGUIDE 37. extinction [iks'tiɳkʃn] extinct (adj) 400 Words Must Have - TOEFL 10 USGUIDE 38. reservoir ['rezəvwɑ:] reserve (v) 400 Words Must Have - TOEFL 10 USGUIDE 39. shrink [ ri k]ʃ ɳ shrinkage (n), shrinkable (adj) 400 Words Must Have - TOEFL 10 USGUIDE 40. stable [steibl] stability (n), stably (adv) 400 Words Must Have - TOEFL 10 USGUIDE 41. adjust [ 'də ʤʌst] adjustable (adj), adjustment (n) 400 Words Must Have - TOEFL 10 USGUIDE 42. arbitrary ['ɑ:bitr ri]ə arbitrate(v), arbitrator (n), arbitrarily (adv) 400 Words Must Have - TOEFL 10 USGUIDE 43. denominator [di'nɔmineit ]ə denominate(v), denomination(n), denominational (adj) 400 Words Must Have - TOEFL 10 USGUIDE 44. exponentially [,ekspou'nenʃ li]ə exponent (n), exponential (adj) 400 Words Must Have - TOEFL 10 USGUIDE 45. infinitesimal [,infini'tesim l]ə infinitesimally (adv) 400 Words Must Have - TOEFL 10 USGUIDE 46. maximize ['mæksimaiz] maximum (n, adj) 400 Words Must Have - TOEFL 10 USGUIDE 47. parallel ['pærəlel] 400 Words Must Have - TOEFL 10 USGUIDE 48. proportion [prə'pɔ:∫n] proportionate(v), proportionally(adv) 400 Words Must Have - TOEFL 10 USGUIDE 49. rate [reit] rate (v), rating (n) 400 Words Must Have - TOEFL 10 USGUIDE 50. sequence ['si :kwəns] sequence(n), sequentially(adv) 400 Words Must Have - TOEFL 10 USGUIDE 51. accuracy ['ækjurəsi] accurate(adj), accurately(adj) 400 Words Must Have - TOEFL 10 USGUIDE 52. adjacent [ə'dʒeisnt] adjacency(n) 400 Words Must Have - TOEFL 10 USGUIDE 53. compress [kəm'pres] compression(n), compressed (adj) 400 Words Must Have - TOEFL 10 USGUIDE 54. feasibly [' f i : zəbli ] feasibility(n), feasible(adj) Must Have Words 55. gut [gʌt] gut(n), gutted (adj) 400 Words Must Have - TOEFL 10 USGUIDE 56. integrally [' intigrəli] integrate(v), integrity(n), intergral(adj, n), 400 Words Must Have - TOEFL 10 USGUIDE 57. overlap ['ouvəlæp] overlap(n) 400 Words Must Have - TOEFL 10 USGUIDE 58. retain [ri ' te in] retainer(n), retention(n) 400 Words Must Have - TOEFL 10 USGUIDE 59. seep [si:p] 400 Words Must Have - TOEFL 10 USGUIDE 60. structure ['strʌkt∫ə] structure(v),structural(adj), structurally(adv) 400 Words Must Have - TOEFL 10 USGUIDE 61. circulate ['sə:kjuleit ] circulation (n) 400 Words Must Have - TOEFL 10 USGUIDE 62. corrode [kə'roud] corrosion(n) 400 Words Must Have - TOEFL 10 USGUIDE 63. derive [di' raiv] derivation(n), derivative(adj) 400 Words Must Have - TOEFL 10 USGUIDE 64. detection [di' tek∫n] detect(v), detectable(adj) 400 Words Must Have - TOEFL 10 USGUIDE 65. expeditiously [,ekspi'di∫əsl i] expedite(v), expedition(n), expeditious(adj) 400 Words Must Have - TOEFL 10 USGUIDE 66. implement [' implimənt] implement(n), implementation(n) 400 Words Must Have - TOEFL 10 USGUIDE 67. innovative [' inouveitiv] innovation(n) 400 Words Must Have - TOEFL 10 USGUIDE 68. installation [,instə' lei∫n] install(v) 400 Words Must Have - TOEFL 10 USGUIDE 69. maintenance ['meintinəns] maitain(v) 400 Words Must Have - TOEFL 10 USGUIDE 70. simulation [,simju'lei∫n] simulate(v), simulator(n) 400 Words Must Have - TOEFL 10 USGUIDE 71. combustion [kəm'bʌst∫n] combuste(v), combustible(adj) 400 Words Must Have - TOEFL 10 USGUIDE 72. component [kəm'pounənt] 400 Words Must Have - TOEFL 10 USGUIDE 73. convey [kən'vei] 400 Words Must Have - TOEFL 10 USGUIDE 74. discretely [dis'kri : t l i ] 400 Words Must Have - TOEFL 10 USGUIDE 75. nucleus ['nju:kl iəs] 400 Words Must Have - TOEFL 10 USGUIDE 76. solar ['soulə'sel] 400 Words Must Have - TOEFL 10 USGUIDE 77. rotate [rou'teit] 400 Words Must Have - TOEFL 10 USGUIDE 78. permeate ['pə:mieit] 400 Words Must Have - TOEFL 10 USGUIDE 79. source [sɔ:s] 400 Words Must Have - TOEFL 10 USGUIDE 80. trigger ['tr igə] 400 Words Must Have - TOEFL 10 USGUIDE 81. acquisition [,ækwi'zi∫n] 400 Words Must Have - TOEFL 10 USGUIDE 82. anomaly [ə'nɔməli] 400 Words Must Have - TOEFL 10 USGUIDE 83. consciously ['kɔn∫əsli] 400 Words Must Have - TOEFL 10 USGUIDE 84. degrade [di'greid] 400 Words Must Have - TOEFL 10 USGUIDE 85. gap [gæp] 400 Words Must Have - TOEFL 10 USGUIDE 86. indisputable [, indis'pju:təbl] 400 Words Must Have - TOEFL 10 USGUIDE 87. intervene [,intə'vi:n] 400 Words Must Have - TOEFL 10 USGUIDE 88. intuitively [,intə'vi:n] 400 Words Must Have - TOEFL 10 USGUIDE 89. recede [ ri 's i :d] 400 Words Must Have - TOEFL 10 USGUIDE 90. retrieve [ri ' t r i :v ] 400 Words Must Have - TOEFL 10 USGUIDE 91. agnostic [æg'nɔstik] 400 Words Must Have - TOEFL 10 USGUIDE 92. animism ['ænimizm] 400 Words Must Have - TOEFL 10 USGUIDE 93. atheist ['eiθi i st ] 400 Words Must Have - TOEFL 10 USGUIDE 94. been inclined to [in'klaind] 400 Words Must Have - TOEFL 10 USGUIDE 95. contemplate ['kɔntempleit] 400 Words Must Have - TOEFL 10 USGUIDE 96. deify ['di: i fa i ] 400 Words Must Have - TOEFL 10 USGUIDE 97. ecclesiastical [i ,kl i :z i 'æstikəl] 400 Words Must Have - TOEFL 10 USGUIDE 98. exalt [ig'zɔ: lt] 400 Words Must Have - TOEFL 10 USGUIDE 99. pious ['paiəs] 400 Words Must Have - TOEFL 10 USGUIDE 100. sacrifice ['sækrifais] 400 Words Must Have - TOEFL 10 USGUIDE 101. aggravate ['ægrəveit] 400 Words Must Have - TOEFL 10 USGUIDE 102. decrepit [di'krepit] 400 Words Must Have - TOEFL 10 USGUIDE 103. disease [di'z i :z ] 400 Words Must Have - TOEFL 10 USGUIDE 104. fatally [' feit l l i ] 400 Words Must Have - TOEFL 10 USGUIDE 105. forensics [fə'rensik] 400 Words Must Have - TOEFL 10 USGUIDE 106. persist [pə'sist] 400 Words Must Have - TOEFL 10 USGUIDE 107. prognosis [prɔg'nousi:z] 400 Words Must Have - TOEFL 10 USGUIDE 108. terminal ['tə:minl] 400 Words Must Have - TOEFL 10 USGUIDE 109. recede [ri 's i :d ] Recession (n); Recessive (adj) 400 Words Must Have - TOEFL 10 USGUIDE 110. retrieve [ri ' tr i :v ] Retriever (n); Retrievable (adj) 400 Words Must Have - TOEFL 10 USGUIDE 111. agnostic [æg'nɔstik] Agnostic (n); Agnosticism (n) 400 Words Must Have - TOEFL 10 USGUIDE 112. animism ['ænimizm] Animistic (adj) 400 Words Must Have - TOEFL 10 USGUIDE 113. atheist ['eiθiist ] atheistic (adj) 400 Words Must Have - TOEFL 10 USGUIDE 114. be inclined to [in'klaind] 400 Words Must Have - TOEFL 10 USGUIDE 115. contemplate ['kɔntempleit ] contemplation (n) contemplative (adj) 400 Words Must Have - TOEFL 10 USGUIDE 116. deify ['di: i fa i ] deity (n) 400 Words Must Have - TOEFL 10 USGUIDE 117. ecclesiastical [i,kl i : z i 'æstikəl ] ecclesiastic (n) ecclesiastically (adv) 400 Words Must Have - TOEFL 10 USGUIDE 118. exalt [ig'zɔ:l t ] exaltation (n) 400 Words Must Have - TOEFL 10 USGUIDE 119. pious ['paiəs] piousness (n) piety (n) piously(adv) 400 Words Must Have - TOEFL 10 USGUIDE 120. sacrifice ['sækrifais ] sacrifice (n) sacrificial (adj) sacrificially (adv) 400 Words Must Have - TOEFL 10 USGUIDE 121. aggravate ['ægrəveit ] aggravation (n) 400 Words Must Have - TOEFL 10 USGUIDE 122. decrepit [di'krepit ] 400 Words Must Have - TOEFL 10 USGUIDE 123. disease [di'zi :z ] 400 Words Must Have - TOEFL 10 USGUIDE 124. fatally ['feit l l i ] fatality (n) fatal (adj) 400 Words Must Have - TOEFL 10 USGUIDE 125. forensics [fə'rensik ] forensic (adj) 400 Words Must Have - TOEFL 10 USGUIDE 126. persist [pə'sist ] persistence (n) persistent (adj) 400 Words Must Have - TOEFL 10 USGUIDE 127. prognosis [prɔg'nousi:z ] 400 Words Must Have - TOEFL 10 USGUIDE 128. terminal ['tə:minl ] terminate v terminally adv 400 Words Must Have - TOEFL 10 USGUIDE 129. vein [vein] 400 Words Must Have - TOEFL 10 USGUIDE 130. wound [ 'meiziηə ] wound (n) 400 Words Must Have - TOEFL 10 USGUIDE 131. anesthesia [,ænis'θi:zjə ] anesthetic (n), (adj) 400 Words Must Have - TOEFL 10 USGUIDE 132. augment ['ɔ:gmənt] augmentation (n) 400 Words Must Have - TOEFL 10 USGUIDE 133. certifiably ['æηk∫ sə ] certify (v), certification (n) certificate (n), certifiable (adj) 400 Words Must Have - TOEFL 10 USGUIDE 134. complication [,kɔmpli'kei∫n] complicate (v) 400 Words Must Have - TOEFL 10 USGUIDE 135. cure [kjuə] cure (n) 400 Words Must Have - TOEFL 10 USGUIDE 136. implant [im'plɑ:nt ] implantation (n) 400 Words Must Have - TOEFL 10 USGUIDE 137. inject [in'dʒekt] injection (n) 400 Words Must Have - TOEFL 10 USGUIDE 138. obese [ou'bi:s ] obesity (n) 400 Words Must Have - TOEFL 10 USGUIDE 139. procedure [prə'si :dʒə] proceed (v), procedural (adj) 400 Words Must Have - TOEFL 10 USGUIDE 140. scar [skɑ:] scar (v) 400 Words Must Have - TOEFL 10 USGUIDE 141. astrological [,æstrə'lɔdʒikəl ] astrology (n), astrologer(n) astrologically (adv) 400 Words Must Have - TOEFL 10 USGUIDE 142. divination [,divi'nei∫n] divine (v) 400 Words Must Have - TOEFL 10 USGUIDE 143. haunt [hɔ:nt] 400 Words Must Have - TOEFL 10 USGUIDE 144. horror ['hɔrə] horrify (v), horrific (adj) 400 Words Must Have - TOEFL 10 USGUIDE 145. de facto [di:'fæktou] de facto (adv) 400 Words Must Have - TOEFL 10 USGUIDE 146. discriminate [dis'krimineit] discriminatory (a) 400 Words Must Have - TOEFL 10 USGUIDE 147. notion ['nou n∫ ] 400 Words Must Have - TOEFL 10 USGUIDE 148. oppress [ 'presə ] oppression (n) 400 Words Must Have - TOEFL 10 USGUIDE 149. paradigm ['pær daimə ] paradigmatic (a) 400 Words Must Have - TOEFL 10 USGUIDE 150. prejudiced ['pred udisidʒ ] prejudice (v) prejudice (n) 400 Words Must Have - TOEFL 10 USGUIDE 151. curriculum [k 'rikjul mə ə ] 400 Words Must Have - TOEFL 10 USGUIDE 152. distinctly [dis'ti ktliη ] distinction (n) distinct (a) 400 Words Must Have - TOEFL 10 USGUIDE 153. erudite ['eru:dait] erudition (n) 400 Words Must Have - TOEFL 10 USGUIDE 154. fortify ['f :tifaiɔ ] fortification (n) fortifiable (a) 400 Words Must Have - TOEFL 10 USGUIDE 155. implicitly [im'plisitli] implicitness = implicitly (n) implicit (a) 400 Words Must Have - TOEFL 10 USGUIDE 156. parochial [p 'rouk lə ə ] parochiality (n) parochialize (v) 400 Words Must Have - TOEFL 10 USGUIDE 157. rigor ['raig :ɔ ] rigorous (a) ['rig r sə ə ] 400 Words Must Have - TOEFL 10 USGUIDE 14. eruption [i'r p nʌ ∫ ] erupt (v) eruptional / eruptive (a) 400 Words Must Have - TOEFL 10 USGUIDE 159. secular ['sekjulə] secularity (n) / secularization (n) secularize (v) 400 Words Must Have - TOEFL 10 USGUIDE 160. suspend [s 'spendə ] suspension (n) suspended/suspensible/suspensive (a) 400 Words Must Have - TOEFL 10 USGUIDE 161. allegiance [ 'li:d nsə ʒə ] allegiant (a) 400 Words Must Have - TOEFL 10 USGUIDE 162. artillery [ :'til riɑ ə ] artilleryman = artillerist (n) [...]... 400 Words Must Have - TOEFL 10 USGUIDE 288 reform [r i ' fɔ :m] 400 Words Must Have - TOEFL 10 USGUIDE 289 400 Words Must Have - TOEFL 10 USGUIDE scandal 290 ['skændl] 400 Words Must Have - TOEFL 10 USGUIDE unmask 291 [ʌn'mɑ:sk] abduction [æb'dʌk∫n] scandalize (v) scandalous (adj) 400 Words Must Have - TOEFL 10 USGUIDE 292 abduct (v) 400 Words Must Have - TOEFL 10 USGUIDE coerce 293 400 Words Must Have. .. chronological (adj) 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 184 core 185 [kɔ : ] deny 186 diminish [ 'd imi∫ ] [d i ' na i ] denial (n) deniably (adv) 400 Words Must Have - TOEFL 10 USGUIDE longitude 187 [ ' l ɔndʒ i t j u : d ] 400 Words Must Have - TOEFL 10 USGUIDE 188 [ 'mi : l j ɜ : milieu ; 400 Words Must Have - TOEFL 10 USGUIDE... impoverishment (n) 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 205 luxury [ ' lʌk∫əri ] nobility 206 207 [nou'bi l i t i ] prestige [pre'st i :ʒ ] luxuriate (v) luxurious (adj) noble (n) noble (adj) prestigious (adj) 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE... 213 asset [ 'æset] 400 Words Must Have - TOEFL 10 USGUIDE 216 lease [l i :s] lease (n) lessor (n) lessee (n) 400 Words Must Have - TOEFL 10 USGUIDE 217 liability 400 Words Must Have - TOEFL 10 USGUIDE 218 proprietor [,laiə'biliti] 220 sole [soul] 400 Words Must Have - TOEFL 10 USGUIDE 221 compensate 400 Words Must Have - TOEFL 10 USGUIDE enterprising ['seifgɑ:d] 400 Words Must Have - TOEFL 10 USGUIDE... (adj) 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 227 marginal 400 Words Must Have - TOEFL 10 USGUIDE merit 228 [in'dʌstriəs]        ['mɑ:dʒinl] ['merit] industriousness (n), industriously (adv) marginally (adv) merit (v), meritorious (adj) 400 Words Must Have - TOEFL 10 USGUIDE 229 promote 400 Words Must Have - TOEFL 10 USGUIDE 230 resign 400 Words Must Have - TOEFL. .. ['pɔləsi ] 400 Words Must Have - TOEFL 10 USGUIDE 252 allegedly [ə' ledʒidl i ] allege (v), allegation (n) 400 Words Must Have - TOEFL 10 USGUIDE 253 400 Words Must Have - TOEFL 10 USGUIDE civil 254 ['s iv l ] 400 Words Must Have - TOEFL 10 USGUIDE convict 255 ['kɔnvikt] guilty ['gi l t i ] guilt (n) convict (n) conviction (n) 400 Words Must Have - TOEFL 10 USGUIDE guiltily (adv) 400 Words Must Have - TOEFL. . .400 Words Must Have - TOEFL 10 USGUIDE 163 battle ['bæ 400 Words Must Have - TOEFL 10 USGUIDE 164 tl] cease 400 Words Must Have - TOEFL 10 USGUIDE hierarchy 165 [si:s] ['haiərɑ:ki] battle (n) cessation (n), ceaseless (adj) hierarchical (adj), hierarchically (adv) 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 166... cohere (v) cohesiveness (n) 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 313 descendant 314 inheritance 315 kin [di 'sendənt] [in'her i təns] [ kin] descend (v) descent (n) inherit (v) inheritor (n) kinship (n) 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE legitimate... fluctuation (n) 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - 400 Words Must Have - TOEFL 10 USGUIDE TOEFL 10 USGUIDE 328 in common 329 [ 'kɔmən ] 331 complex willing ['wi l iη ] [ sɔl i 'dærəti ] 400 Words Must Have - TOEFL 10 USGUIDE 330 solidarity will (v),will (n),willingness (n) 400 Words Must Have - TOEFL 10 USGUIDE 332 despondent [ 'kɔmpleks] 400 Words Must Have - TOEFL 10 USGUIDE... itə s' ou] kw 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE adolescent 361 362 [,ædou'lesnt] 400 Words Must Have - TOEFL 10 USGUIDE cause 363 [kɔ:z] conflict ['kɔnflikt] (n) adolescen, (n) adolescence conflict (n) 400 Words Must Have - TOEFL 10 USGUIDE 400 Words Must Have - TOEFL 10 USGUIDE delinquency 364 365 [di'liηkwənsi] fringe 400 Words Must Have - TOEFL 10 USGUIDE . permeate ['pə:mieit] 400 Words Must Have - TOEFL 10 USGUIDE 79. source [sɔ:s] 400 Words Must Have - TOEFL 10 USGUIDE 80. trigger ['tr igə] 400 Words Must Have - TOEFL. ∫ erupt v 400 Words Must Have - TOEFL 10 USGUIDE 15. famine ['fæmin] 400 Words Must Have - TOEFL 10 USGUIDE 16. flood [fl d]ʌ flood v 400 Words Must Have