revoke (

     n : the mistake of not following suit when able to do so [syn: renege]
     v 1: fail to follow suit in a card game when able and required to
          do so
     2: annul by recalling or rescinding; "He revoked the ban on
        smoking"; "lift an embargo"; "vacate a death sentence"
        [syn: annul, lift, countermand, reverse, repeal,
         overturn, rescind, vacate]