cav·il /ˈkævəl/
  無端的指責,挑剔(vi.)(vt.)吹毛求疵
  Kev·el n.
  1. Naut. A strong cleat to which large ropes are belayed.
  2. A stone mason's hammer. [Written also cavil.]
  Kevel head Naut., a projecting end of a timber, used as a kevel.
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  Cav·il v. i. [imp. & p. p. Caviled ∨ Cavilled p. pr. & vb. n. Caviling ∨ Cavilling.]  To raise captious and frivolous objections; to find fault without good reason.
  You do not well in obstinacy
  To cavil in the course of this contract.   --Shak.
  Cav·il, v. t. To cavil at. [Obs.]
  Cav·il, n. A captious or frivolous objection.
     All the cavils of prejudice and unbelief.   --Shak.
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  cavil
       n : an evasion of the point of an argument by raising irrelevant
           distinctions or objections [syn: quibble, quiddity]
       v : raise trivial objections [syn: carp, chicane]
       [also: cavilling, cavilled]