Source : Webster's Revised Unabridged Dictionary (1913)

Captious \Cap"tious\, a. [F. captieux, L. captiosus. See
   {Caption}.]
   1. Apt to catch at faults; disposed to find fault or to
      cavil; eager to object; difficult to please.

            A captious and suspicious age.        --Stillingfleet.

            I am sensible I have not disposed my materials to
            abide the test of a captious controversy. --Bwike.

   2. Fitted to harass, perplex, or insnare; insidious;
      troublesome.

            Captious restraints on navigation.    --Bancroft.

   Syn: Caviling, carping, fault-finding; censorious;
        hypercritical; peevish, fretful; perverse; troublesome.

   Usage: {Captious}, {caviling}, {Carping}. A captious person
          is one who has a fault-finding habit or manner, or is
          disposed to catch at faults, errors, etc., with
          quarrelsome intent; a caviling person is disposed to
          raise objections on frivolous grounds; carping implies
          that one is given to ill-natured, persistent, or
          unreasonable fault-finding, or picking up of the words
          or actions of others.

                Caviling is the carping of argument, carping the
                caviling of ill temper.           --C. J. Smith.

Source : WordNet®

captious
     adj : tending to find and call attention to faults; "a captious
           pedant"; "an excessively demanding and faultfinding
           tutor" [syn: {faultfinding}]