forfeit
n
1 something lost or given up as a penalty for a fault, mistake, etc.
2 the act of losing or surrendering something in this manner
3 (Law) something confiscated as a penalty for an offence, breach of contract, etc.
a a game in which a player has to give up an object, perform a specified action, etc., if he commits a fault
b an object so given up
vb
5 tr to lose or be liable to lose in consequence of a mistake, fault, etc.
a to confiscate as punishment
b to surrender (something exacted as a penalty)
adj
7 surrendered or liable to be surrendered as a penalty
(C13: from Old French forfet offence, from forfaire to commit a crime, from Medieval Latin foris facere to act outside (what is lawful), from Latin foris outside + facere to do)
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forfeitable adj
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forfeiter n