avail
noun [ U ] uk/əˈveɪl/ us/əˈveɪl/
效用；帮助；利益
use, purpose, advantage, or profit
We tried to persuade her not to resign, but to no avail (= did not succeed). 我们力劝她不要辞职，可是没有用。
My attempts to improve the situation were of little/no avail. 我竭力扭转局面，但是收效甚微／徒劳无功。
avail
verb [ T ] uk/əˈveɪl/ us/əˈveɪl/
old use（对某人或某物）有帮助；有用
to help or be useful to someone or something
Our efforts availed us nothing (= did not help). 我们的努力全是徒劳。
Indian English利用
to make use of something
Over a thousand learners have already availed the opportunity to study at our college. 已有一千多名学生抓住机会在我校学习。
To avail this offer, please click here. 如要接受该优惠，请点击这里。
Phrasal verb
avail yourself of something 利用
to make use of something
Employees should avail themselves of the opportunity to buy cheap shares in the company. 雇员应利用这次机会低价认购公司股份。