Source : Webster's Revised Unabridged Dictionary (1913)

Tax \Tax\, v. t. [imp. & p. p. {Taxed}; p. pr. & vb. n.
   {Taxing}.] [Cf. F. taxer. See {Tax}, n.]
   1. To subject to the payment of a tax or taxes; to impose a
      tax upon; to lay a burden upon; especially, to exact money
      from for the support of government.

            We are more heavily taxed by our idleness, pride,
            and folly than we are taxed by government.
                                                  --Franklin.

   2. (Law) To assess, fix, or determine judicially, the amount
      of; as, to tax the cost of an action in court.

   3. To charge; to accuse; also, to censure; -- often followed
      by with, rarely by of before an indirect object; as, to
      tax a man with pride.

            I tax you, you elements, with unkindness. --Shak.

            Men's virtues I have commended as freely as I have
            taxed their crimes.                   --Dryden.

            Fear not now that men should tax thine honor. --M.
                                                  Arnold.

Source : WordNet®

taxing
     adj : not easily borne; wearing; "the burdensome task of preparing
           the income tax return"; "my duties weren't onerous; I
           only had to greet the guests"; "a taxing schedule"
           [syn: {burdensome}, {onerous}]