English Words Starting With O

• obrogation

  nounVery Rare
  /ˌɒbrəˈɡeɪʃ(ə)n/The act of altering or repealing a law by a subsequent law.
• obscenity

  nounC1
  /əbˈsenəti/an extremely offensive word, expression, or act.
• obscurant

  adjectivenounLow (Literary/Academic)
  /ˈɒbskjʊrənt/A person who deliberately makes things obscure, prevents knowledge from spreading, or opposes enlightenment and clarity.
• obscurantism

  noununcommon
  /ˌɒb.skjʊəˈræn.tɪ.zəm/The practice of deliberately preventing the facts or full details of something from becoming known; opposition to the spread of knowledge.
• obscuration

  nounC2
  /ˌɒb.skjʊəˈreɪ.ʃən/The action of making something dark, dim, or unclear; the state of being obscured.
• obscure

  adjectivenounverbverb-transitiveC1
  /əbˈskjʊə/not well-known, difficult to see or understand
• obscurity

  nounC1
  /əbˈskjʊə.rə.ti/The state of being unknown, inconspicuous, or difficult to understand.
• obscurum per obscurius

  nounVery low (Academic/Latin phrases)
  /ɒbˈskjʊə.rəm pɜːr ɒbˈskjʊə.ri.əs/Explaining something obscure by means of something even more obscure.
• obsecrate

  verbverb-transitiveVery Low / Archaic
  /ˈɒbsɪkreɪt/To beseech or beg for something earnestly; to implore in a solemn or urgent manner.
• obsequence

  nounVery Rare / Archaic
  /ˈɒbsɪkwəns/Obedient or servile compliance; the act of following or yielding to someone's will or authority.
• obsequent stream

  nounC2 (Very Low Frequency / Technical)
  /ˈɒbsɪkwənt striːm/A stream or river that flows in a direction opposite to the original slope of the land, specifically against the dip of the rock layers.
• obsequies

  plural-nounC2
  /ˈɒbsɪkwiz/A funeral or burial ceremony.
• obsequiousness

  nounC2
  /əbˈsiːkwiəsnəs/The quality of being obedient or attentive in an excessive, fawning, or servile manner, especially to gain favour.
• obsequy

  nounC2
  /ˈɒbsɪkwiz/A funeral rite or ceremony.
• observance

  nounC1
  /əbˈzɜː.vəns/The act of following a rule, law, or custom, or a ceremony that celebrates a tradition.
• observant

  adjectivenounB2
  /əbˈzɜːvənt/Quick to notice things; paying close attention to details.
• observation

  nounB1
  /ˌɒb.zəˈveɪ.ʃən/The action or process of closely watching or monitoring someone or something, especially to gain information.
• observation car

  nounC2 / Very Low Frequency
  /ˌɒbzəˈveɪʃən kɑː/A special type of railway carriage, typically at the rear of a train, designed with large windows, a rounded or domed end, and sometimes an open platform, to provide passengers with a panoramic view of the scenery.
• observation post

  nounC1
  /ˌɒbzəˈveɪʃən pəʊst/A designated position from which a person can watch an area, typically for military, scientific, or security purposes.
• observatory

  nounC1
  /əbˈzɜː.və.tri/A building or structure equipped with telescopes and other instruments for observing and studying celestial bodies and astronomical phenomena.

Showing 201–220 of 3187 words.