avail

他的建议对我毫无帮助。

His advice did not ___avail me at all.

你的劝说对他毫无作用。

Your persuasion did not ___avail him at all.

尽管他付出了很多努力，但这些努力对他找工作没有起到任何作用。

Despite his hard work, it was of no ___avail in finding a job.