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Webster 1828 Edition

Noun.

One who cavils; one who is apt to raise captious objections; a captious disputant.

caviler ‎(plural cavilers)

A person who cavils; a faultfinder, quibbler or nitpicker
- 1817 John Nicholas - Illustrations of the Literary History of the Eighteenth Century
  a man who comments on the Bible affords all the opportunity a caviler could wish for.