The term 'prevailed upon' means to persuade or urge someone to do something. The two crossword solutions for this term are 'PERSUADED' (9 letters) and 'URGED' (5 letters). This phrase is often used to describe a situation in which someone is convinced to do something they may not have wanted to do. It can also be used to describe a situation in which someone is encouraged to do something they may not have considered doing.