did not stop, did not quit
雨が降っても、彼らは自分の仕事をやめなかった。
Even though it rained, they didn't stop working.
彼女はその習慣を死ぬまでやめなかった。
She never gave up that habit until the day she died.
彼は話すのをやめなかった。
He didn't stop talking.
彼らは疲れていたけれども、仕事をやめなかった。
Although they were tired, they didn't stop working.