revoke
n : the mistake of not following suit when able to do so [syn: {renege}]
v 1: fail to follow suit 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}]
Source: WordNet® 2.0