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  1. oakum
    loose hemp or jute fiber obtained by unravelling old ropes
  2. obdurate
    stubbornly persistent in wrongdoing
  3. obelisk
    a stone pillar tapering towards a pyramidal top
  4. obese
    excessively large
  5. obesity
    the condition of being excessively overweight
  6. obituary
    a notice of someone's death
  7. objective
    the goal intended to be attained
  8. obligate
    force somebody to do something
  9. obligatory
    required by compulsion or convention
  10. oblique
    slanting or inclined in direction or course or position
  11. obliterate
    remove completely from recognition or memory
  12. oblivion
    the state of being disregarded or forgotten
  13. oblong
    deviating from a shape by being elongated in one direction
  14. obnoxious
    causing disapproval or protest
  15. obsequious
    attempting to win favor from influential people by flattery
  16. observance
    conformity with law, custom, or practice
  17. observant
    quick to notice; showing quick and keen perception
  18. observatory
    a building equipped to view astronomical phenomena
  19. obsolescence
    falling into disuse or becoming out of date
  20. obsolescent
    becoming disused or outdated
  21. obsolete
    no longer in use
  22. obstetrician
    a physician specializing in childbirth
  23. obstetrics
    the branch of medicine dealing with childbirth and pregnancy
  24. obstinacy
    resolute adherence to your own ideas or desires
  25. obstreperous
    noisily and stubbornly defiant
  26. obstruct
    block passage through
  27. obstruction
    any structure that makes progress difficult
  28. obtrude
    push to thrust outward
  29. obtrusive
    sticking out; protruding
  30. obviate
    do away with
  31. occasion
    an event that occurs at a critical time
  32. Occident
    the countries of Europe and North America and South America
  33. occlude
    block passage through
  34. occult
    supernatural forces and events and beings collectively
  35. occupant
    someone who lives at a particular place for a long period
  36. occurrence
    an instance of something happening
  37. octagon
    a shape with eight angles and eight sides
  38. octave
    a musical interval of eight tones
  39. octavo
    the size of a book whose pages are made by folding a sheet of paper three times to form eight leaves
  40. octogenarian
    being from 80 to 89 years old
  41. ocular
    relating to or resembling the eye
  42. oculist
    a person skilled in testing for defects of vision
  43. oddity
    eccentricity that is not easily explained
  44. ode
    a lyric poem with complex stanza forms
  45. odious
    extremely repulsive or unpleasant
  46. odium
    hate coupled with disgust
  47. odoriferous
    emitting a smell, especially an unpleasant smell
  48. odorous
    having a characteristic aroma
  49. off
    from a particular thing or place or position
  50. offhand
    with little or no preparation or forethought
  51. officiate
    perform a ceremony or religious ritual
  52. officious
    intrusive in a meddling or offensive manner
  53. offshoot
    a natural consequence of development
  54. ogre
    (folklore) a giant who likes to eat human beings
  55. ointment
    skin cream that has a soothing, moisturizing effect
  56. olfactory
    of or relating to the sense of smell
  57. ominous
    threatening or foreshadowing evil or tragic developments
  58. omission
    leaving out or passing over something
  59. omnipotence
    the state of having unlimited power
  60. omnipotent
    having unlimited power
  61. omniscience
    the state or quality of having infinite knowledge
  62. omniscient
    knowing, seeing, or understanding everything
  63. omnivorous
    feeding on both plants and animals
  64. onerous
    burdensome or difficult to endure
  65. onrush
    a forceful forward rush or flow
  66. onset
    the beginning or early stages
  67. onslaught
    an offensive against an enemy
  68. onus
    a burdensome or difficult concern
  69. opalescence
    the visual property of something having a milky brightness and a play of colors from the surface
  70. opaque
    not transmitting or reflecting light or radiant energy
  71. operate
    perform as expected when applied
  72. operative
    producing a desired effect
  73. operator
    an agent that operates some apparatus or machine
  74. operetta
    a short amusing opera
  75. opinion
    a personal belief or judgment
  76. opponent
    someone who offers resistance
  77. opportune
    suitable or advantageous especially for a particular purpose
  78. opportunity
    a possibility from a favorable combination of circumstances
  79. opposite
    being directly across from each other
  80. opprobrium
    a state of extreme dishonor
  81. optic
    of or relating to or resembling the eye
  82. optician
    a worker who makes glasses for remedying defects of vision
  83. optimism
    the hopeful feeling that all is going to turn out well
  84. option
    one of a number of things from which only one can be chosen
  85. optometry
    the practice of an optometrist
  86. opulence
    wealth as evidenced by sumptuous living
  87. opulent
    rich and superior in quality
  88. oral
    using speech rather than writing
  89. orate
    make speeches
  90. oration
    an instance of formal speaking
  91. orator
    a person who delivers a speech
  92. oratorio
    a musical composition for voices and orchestra
  93. oratory
    the act of addressing an audience formally
  94. ordeal
    a severe or trying experience
  95. ordinal
    being or denoting a numerical order in a series
  96. ordination
    the act of conferring holy orders
  97. ordnance
    military supplies
  98. origin
    the place where something begins
  99. original
    preceding all others in time
  100. originate
    come into existence; take on form or shape
  101. ornate
    marked by complexity and richness of detail
  102. orthodox
    adhering to what is commonly accepted
  103. orthodoxy
    the quality of adhering to what is commonly accepted
  104. orthogonal
    meeting at right angles
  105. orthopedic
    of or relating to the treatment of bones or joints
  106. oscillate
    move or swing from side to side regularly
  107. osculate
    kiss
  108. ossify
    become bony
  109. ostentation
    pretentious or showy or vulgar display
  110. ostracism
    the act of excluding someone from society by general consent
  111. ostracize
    expel from a community or group
  112. oust
    remove from a position or office
  113. out-and-out
    complete and without restriction or qualification
  114. outbreak
    a sudden occurrence or increase of something undesirable
  115. outburst
    an unrestrained expression of emotion
  116. outcast
    a person who is rejected (from society or home)
  117. outcry
    a loud utterance, often in protest or opposition
  118. outdo
    be or do something to a greater degree
  119. outlandish
    noticeably or extremely unconventional or unusual
  120. outlaw
    a criminal, especially one on the run from police
  121. outlive
    live longer than
  122. out-of-the-way
    remote from populous or much-traveled regions
  123. outpost
    a military post stationed at a distance from the main body of troops
  124. outrage
    a disgraceful event
  125. outrageous
    greatly exceeding bounds of reason or moderation
  126. outreach
    the act of reaching out
  127. outride
    ride better, faster, or further than
  128. outrigger
    a stabilizer for a canoe
  129. outright
    without reservation or concealment
  130. outskirt
    a part of the city far removed from the center
  131. outstrip
    go far ahead of
  132. outweigh
    be more important or signficant than
  133. overdo
    do something to an excessive degree
  134. overdose
    dose too heavily
  135. overeat
    overeat or eat immodestly; make a pig of oneself
  136. overhang
    project over
  137. overleap
    jump across or leap over (an obstacle)
  138. overlord
    a person who has general authority over others
  139. overpass
    bridge formed by the upper level of a crossing of two highways at different levels
  140. overpower
    defeat by superior force
  141. overreach
    fail by aiming too high or trying too hard
  142. overrun
    seize the position of and defeat
  143. oversee
    watch and direct
  144. overseer
    a person who directs and manages others
  145. overshadow
    cast a shadow upon
  146. overthrow
    reject or overturn a decision or an argument
  147. overtone
    (usually plural) an ulterior implicit meaning or quality
  148. overture
    orchestral music at the beginning of an opera or musical
  149. overweight
    usually describes a large person who is fat but has a large frame to carry it
  150. oaf
    an awkward, foolish person
  151. obeisance
    bending the head or body in reverence or submission
  152. obloquy
    state of disgrace resulting from public abuse
  153. ogle
    stare or look at, especially with amorous intentions
  154. onomatopoeia
    using words that imitate the sound they denote
  155. opus
    a musical work that has been created
  156. orifice
    an opening, especially one that opens into a bodily cavity
Created on 五月 11, 2013

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