Revoke
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In trick-taking card games, a revoke (sometimes renege, /rɪˈneɪɡ/ or /rɪˈniːɡ/) is a violation of the rules regarding the play of tricks that is sufficient to render the round invalid. A revoke is a violation ranked in seriousness somewhat below overt cheating, and is considered a minor offense when unintentional, though there are usually severe penalties for revokes. A revoke is usually a violation of one or more honor rules, and often comes to light after its commission, as trick-taking games play with hands concealed.