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Noun: caviler  ka-vu-lur
Usage: US (elsewhere: caviller)
  1. A disputant who quibbles; someone who raises annoying petty objections
    "The caviler's constant nitpicking slowed down the meeting";
    - quibbler, caviller [Brit, Cdn], pettifogger [archaic]

Derived forms: cavilers

Type of: malcontent