I need a word to describe someone who has been told something they don't like, but they have to accept it.
EX:
"We need to travel all the way to Montreal to pick up my sister," Mom says.
Dad sits back in his seat, and (missing word here). "Fine," he says.
"We need to travel all the way to Montreal to pick up my sister," Mom says.
Dad sits back in his seat, and __________. "Fine," he says.