withhold
     v 1: hold back; refuse to hand over or share; "The father is
          withholding the allowance until the son cleans his room"
          [syn: {keep back}]
     2: retain and refrain from disbursing; of payments; "My
        employer is withholding taxes" [syn: {deduct}, {recoup}]
     [also: {withheld}]
Source: WordNet® 2.0