back down from

1 放弃

surrender abandonment cession abnegation drop bag reverse yield desert abandon waive chuck lapse relinquish forgo jettison forswear deep-six back off from let drop bottle it throw your hand in close the book on let go get out of give up back down lay down let go of back off part with pack up pass up back down on

2 认输

knuckle under to knuckle under give up back down give in give in to back down on throw in the towel