My dictionary lists a few where the translation is the same but I dont think they have the correct meaning. "Relent" "retreat" "concede" ( maybe this one?)
has the meaning of reluctantly agreeing, converting over, after putting up some sort of resistance.
Two other words with the same implied meanings are
You could also try: Yield, concede (defeat), admit (defeat), give up, back down or throw in the towel.
Another alternative is succumb which means to give in to a force stronger than oneself. It suggests almost powerlessness. Here is the definition: http://www.thefreedictionary.com/succumb