Cards . to play a card that is not of the suit led when one can follow suit; break a rule of play.

to go back on one's word

He has reneged on his promise.

Archaic . to deny; disown; renounce.

Cards . an act or instance of reneging.

verb

break one’s promise , cop out * , default , reverse , weasel out , welsh , back down , retreat , decline , disown , renounce , revoke , withdraw