Source : Webster's Revised Unabridged Dictionary (1913)

Taint \Taint\, v. i. [imp. & p. p. {Tainted}; p. pr. & vb. n.
   {Tainting}.]
   To thrust ineffectually with a lance. [Obs.]

Source : WordNet®

tainted
     adj 1: touched by rot or decay; "tainted bacon"; "`corrupt' is
            archaic" [syn: {corrupt}]
     2: especially of reputation; "the senator's seriously damaged
        reputation"; "a flyblown reputation"; "a tarnished
        reputation"; "inherited a spotted name" [syn: {besmirched},
         {damaged}, {flyblown}, {spotted}, {stained}, {sullied}, {tarnished}]