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1. *–omin- omen: ominous, abominable
2. *omni- every, all: omnibus, omnipotent, omnipresent, omniscient
3. omphalo- nel: omphalos
4. *–on particle: electron, neutron, meson （不影响重音）/Cn/
5. –oner- load: exonerate, onerous
6. onto- existence: ontology
7. *–onym- name: anonymous, anonymity, synonym, cryptonym, homonymous, pseudonym, patronymic, matronymic
8. –oon n. thing: spittoon, carton, festoon （重音’oon）/u:n/
9. *op- see ob-
10. –op- wealth: opulent, opulence
11. –oper- work: opus, operate, inoperable, cooperation, opera, operation
12. ophio- snake: ophiology, ophiolatry
13. –opin- suppose: opionion
14. *–opt- choose: option, optional, adopt, optional
15. opt- eye: optical, optics
16. *–or-: mouth: oral, oratory
17. *–or [variant of -er]: translator, oppressor, resistor, actor （不影响重音）
18. –orb-, -orbit- circle: orbit, exorbitant
19. *–ordin- order, rank: subordinate, ordinance, ordain, coordinator
20. –ori-, -ort- rise: orient, abortion, origin, orientate, disorientate, originate
21. *–orium place: auditorium, crematorium （重音’orium）/C:ri[m/
22. –orn- equip, furnish: ornament, adorn, suborn, ornate, adorment
23. ornitho- bird: ornithology
24. oro- mountain: orogeny, orography
25. ortho- upright: orthodox, orthodoxy
26. *–ory 1) adj.: explanatory, obligatory, satisfactory 2) n.: observatory, conservatory, drpository （重音大多’ - - ory /[ri/，美音 ‘ - - ‘ory /C:ri/）
27. *–ose 1) substance: glucose 2) adj. bellicose, jocose （重音’- - ose）/[us/
28. *-osis condition: apotheosis （重音’osis，但meta’morphosis）/[usis/
29. *–osity n. of adj. ending in –ous or –ose, excluding –eous, -uous: pomposity, bellicosity, religiosity （重音’osity）/Csiti/
30. –oss- bone: osseous, ossify
31. osteo- [oste- before a vowel] bone: osteitis
32. -oto- [-ot- before a vowel] ear: otalgia, otology, otophone, otopathy, otic, entotic, otoscope, parotitis, parotid
33. *–ot n. person: patriot, zealot, patriot, idiot （不影响重音）
34. *–ous n. → adj.: dangerous, barbarous, prosperous, continuous（重音’- - ous）/[s/
35. *out- 1) situated at or ing from a point away, outside, external: outbuilding, outpatient 2) going away or forth, outward: outbound 3) better, greater, or more than: outdo, outsell, outsmart, outshine, outgrow, outdrink, outleap, outproduce
36. ov- ovum: oval
37. ovario- ovary: ovariotomy
38. ovato- of the shape of an ovum: ovatoform
39. *over- 1) above in position, over, outer, upper: overhead 2) superior, eminent: overlord 3) passing across or beyond: overshoot, overpass, overrun 4) passing over the top or brim of : overflow 5) denoting movement downward from above: overwhelm, overturn, overthrow 6) across the surface of: overgrowth, overprint 7) more than, excessively, beyond the normal, extra: overrate, oversell, overdo, overactive, overbold, overcook, overdecorate
40. –paci- peace: pacific, pacify, pacification
41. palato- [palat- before a vowel] jaw: palatal
42. paleo- extremely ancient: paleobotany, paleography, paleochronology, paleoanthropology
43. –palli- cover: palliative, palliate
44. *pan- including all: pan-Pacific, pantheism, pan-American
45. *–pand-, -pans-, -pass- spread: expand, expanse, pass
46. *–par- 1) equal: disparate, par, separate, disparity, imparity, nonpareil, pare, parison 2) show: apparent, transparent, apparition 3) bring forth: parent, parental, primipara, multiparous, uniparous
47. *para- 1) by the side of, past, to one side, aside from: parallel, parasite 2) beyond: paranormal 3) subsidiary to: paralegal, paramedic 4) in a secondary or accessory capacity: paramilitary, parapolicital 5) like or resembling: pararuminant 6) mistake: paradox, paralogism
48. *para- 1) protection of or against: parasol, parachute 2) using a parachute: pararescue, paradog, paratroops, paradrop, parashoot
49. –para giving brith: nullipara, multipara, primipara
50. –parl- speak: parliament, parley, parlor, parlance
51. –part- divide, part: partial, impartiality, departure, party, particle, particular, department, partment, partiality, partition, apart, repartition, partake
52. –past- feed: pasture, pastor, pastoral, repast
53. *–pater-, -patr- father: paternal, patriot, patriarchy, patrimony, patricide, patronize, patriot, expatriate, repatriate
54. –pat-, -pass- suffer: patience, passion, passion
55. *–path- feeling, pain, disease, treatment: pathology, pathos, sympathy, antipathetic, apathy, pathogenic, zoopathology, neuropathy, electropathy
56. *-pathetic adj. of n. ending in –pathy: sympathetic, antipathetic
57. –pecc- sin: impeccable
58. –pector- breast: expectorate, pectoral
59. *–ped-, -pod- foot: centipede, stampede, quadruped, biped, pedal, antipode
60. *pedia-, pedo- children: pediatrician, pedophile, pedology, pedagogy, pedagogic, pediatrist
61. *–pel, -pell-, -puls- push: expel, propeller, impulse, impel, pel, pulsory, repel, dispel
62. pen- [also pene-] nearly: peninsula, penultimate, peneplain
63. –pen-, -pun- punish: penal, penalty, punish, impunity, punitive
64. *–pend-, -pens- hang, pay: expenditure, spend, expendable, pendant, pension, depend, dependent, independence, pending, suspend, suspense, appendage, append
65. –penia deficiency: glycopenia （重音’penia）
66. *penta- five: pentagon, pentameter, pentalent
67. *per- 1) through, throughout, intensive: perspective, perfect, perennial, perspire, perfoliate, persuade, perplex, perturb 2) thoroughly, pletely, very: perfervid 3) [in chemical terms] 过，高: peroxide, peracid
68. *peri- around, surrounding: perimeter, peripheral, perigee, perilune, pericardial
69. –pest- plague: pestilence, pester
70. *–pet-, -peat, -petit- seek: petition, repeat, pete, petition, appetite, petitionary
71. petro- [petr- before a vowel] stone: petroleum, petrify, petrodollar
72. –pexy fixation: enteropexy
73. pharm- medicine: pharmacy, pharmaceutical
74. *photo- light or photography: photo, photosynthesis
75. phaco- crystal: phacocele
76. –phag- eat: phagomania, bacteriophage
77. *–phil- love: philosophy, philology, philanthropy, photophilous
78. *–phile someone who loves: pedophile, bibliophile, Anglophile, Sinophile
79. *–philia: pedophilia
80. *–philiac: adj. pedophiliac
81. pheno- 苯基: phenol, phenolase
82. *–phobe someone who fears: xenophobe
83. *–phobia fear: cancerophobia, xenophobia, acrophobia, zoophobia, dentophobia, neophobia, hydrophobia
84. *–phobic adj. of n. ending in –phobia: xenophobic, acrophobic
85. *–phon- sound: microphone, telephone, phone, videophone, otophone, symphony, symphonic, phoic, phoics, electrophone, stereophone, gramophone, phonology, cacophony, euphony, euphonious
86. –phor- bear [v]: anaphora, aphorism, metaphor
87. *-photo- light: photograph, photochemistry, photoprint, photocopy, photogenic, photoelectric, photon, photosensitive, photosynthesis
88. phreno- 心，膈: phrenic, phrenalgia
89. phyllo- leaf
90. *physio- nature: physiology, physician, physics, physical
91. –phyt- plant: phytochemistry, phytoecology
92. –pi- pious: impious, impiety
93. pico- 1/1,000,000,000,000: pieter
94. *–pict- paint: depict, picture, picturesque, pictorial, picturesque
95. –pisc- fish: piscatorial, piscary, piscator, piscine
96. *–plac- satisfy: implacable, placency
97. –plan- clear: plain, explanatory
98. plano- flat: planography, planospore
99. –plasm-, -plast 血浆，原生质: metaplasm, protoplast, plasmagene
100. –plasty formation: labioplasty, rhinoplasty
101. –plaud-, -plaus- applause: plausible
102. –pleb- mon people: plebian, plebiscite
103. –plegia paralysis: hemiplegia, glossoplegia
104. *–plen- full: plenty, plenary, replenish, deplenish, plenum, plenitude
105. pleo- more: pleonasm
106. pleuro- ribs: pleurocele
107. *–ple-, -plet-, -pli-, -plish-, -ply cover, fill: plete, replete, depletion, implement, supplement, reply, ply, imply, acplish
108. *–plex-, -plic-, -ploy- fold: plex, implicate, explicate, deploy, employ, duplex, triplex, quadruplex, simplex, perplex, perplexity, plicate, plicate, inexplicable, explicit, implicit, supplicate, supplicatory, implicative
109. –plor- explore, deplore, deplorable
110. pneum- lung, air: pneumonia, pneumectomy
111. pneumato- air: pneumatology, pneumatometer
112. *–pon-, -pos-, -posit-, -pound put: exponent, posure, depository, postpone, expound, propound, pound, opponent, propose, repose, disposal, disposition, depose, exponent, expose, exposure, exposition, exponible
113. –ponder- weight: ponderous, preponderate
114. –poiesis production: hemopoiesis
115. *–polis-, -polit- city: cosmopolitan, metropolis, acropolis, political, necropolis, polis
116. *politico- of politics: politico-economics
117. *poly- many, much: polygamy, polychrome, polymorphous, polyfunctional, polygon
118. *–popul- people: populace, population, repopulate, popular, populous, popularity, popularize
119. *–port- 1) door: portal, portico 2) carry: porter, report, transport, import, portable, importation, export, deport, deportee, reportage, portage, supporter, portfolio
120. *–poss-, -pot- power: possible, impotent, potency
121. *post- after, behind: postwar, postgraduate, post, postnatal
122. *pre- before, in front of, in advance: preview, previous, prediction, prepay, prehistory, preheat, prehuman, predetermine
123. –pred- booty: depredation, predator
124. *–prehend, -prehens-, -pris-, -pregn- take: prehensive, apprehend, surprise, reprisal, impregnate, pregnancy
125. presby- old: presbyope
126. –preci- price: appreciate, depreciate, appreciative, precious
127. *–press- push: impression, expressive
128. preter- past, beyond: preternatural
129. *–prim- [positive] first; prior- [parative]: prime, primeval, primitive, primary, primacy, primer, priority, prioritize
130. –priv- deprive: deprive, privation, private, privy
131. *pro-, pur- forward, for, in for of: progress, pronoun, pro-consul, prolocutor, pro-America, pro-abortionist, pursuit
132. *–prob-, -prov- prove: probable, approbation, probation, disprove
133. *–propr- one’s own: proper, property, propriety, appropriate
134. –proxim- near: proximity, approximate
135. *–proof resistant to: waterproof, bulletproof, lightproof （不影响重音）
136. proto- the first: prototype, protoplasm, protozoan, protogenic, protohuman
137. *pseudo- false: pseudonym, pseudoscience, pseudoclassic, pseudology
138. *psycho- [psych- before a vowel] mind: psychic, psychopath, psychology
139. –ptosis 下垂: gastroptosis （重音’ptosis）/t[usis/
140. –public- public: publicize, publicity
141. –pud- shame: impudent
142. –puer- boy: puerile
143. –pugn- fight: repugnant, pugnacious
144. –pulmo- lung: pulmonary
145. –pulver- dust: pulverize
146. *–punct- point: punctual, acupuncture, puncture, punction, puntious
147. pur- =pro- pursuit, purpose
148. –pur- pure: impure, purify, purism, depurator
149. –purg- cleanse: purge, purgatory
150. *–put- think: dispute, impute, pute, putative
151. pyel-: 肾盂: pyelitis
152. pyo- pus: pyocy
153. pyr- fire: pyrogenic, pyrolatry
154. *quadri-, quadru- [quadr- before a vowel]four: quadruped, quadriceps, quadrennial, quadripartite, quadrilingual
155. –quant- amount: quantity, quantum
156. *–quir-, -quisit-, -quest seek: inquire, inquisition, request, requisite, exquisite
157. *quasi- similar: quasi-science, quasi-official, quasi-war （英音/kwa:zi/，美音/kweizai/）
158. –quer- plain: querulous
159. *–quiesc-, -quit- quiet: quiet, quietude, acquiesce, quiescent, acquittal
160. quinque- [quinqu- before a vowel] five: quniquangular, quinquennial
161. quot- how many: quota, quotient
162. *–rad-, -ras- scrape: erase, erasable, eraser, erasure, abrade, abradant, abrasive, raze, razor
163. –radic- root: radical, eradicate
164. –ram- twig: ramify, ramification
165. *–rap-, -rapt- seize: rape, rapacious, rapt, rapture, rish, rapt, rapine
166. –rar- thin: rarity, rarefy
167. *radio- of radio or radioactivity: radioactive
168. –rat- think: rational
169. *re- 1) back, returning to a previous state: return, relapse, recall, reclaim, retract, revoke 2) again, anew, over again [It is used with a “-” to distinguish such words re-collect/recollect; to indicate nonce words: re-urge; before words beginning with e]: refurbish, replenish, recount, reunite, remarry 3) against: reaction, reverse, resist, rebel, resent 4) intensive: reception
170. *–rect-, -rig- right: correct, incorrigible, resurrection, rectitude, corrective, incorrect, rectify, rectilinear, rectangle, erect, erection, erectile, rectum
171. –rei- thing: reification
172. –relinqu-, -relict- lee: relinquish, derelict
173. –rept- creep: reptile, surreptitious
174. –ress [variant of –ess, usuallt following t] huntress, waitress, actress （不影响重音）/ris/
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