• n. 效用，利益
• vt. 有益于，有益于；使對某人有利。
• vi. 有益于，有益于；使對某人有利。

前綴a-同ad-, 去，往. 詞根val, 力量，詞源同value, valiant. 指有益的，有力量的。

avail

avail: see value

avail (v.)

c. 1300, availen, apparently a French compound formed in English from Old French a- "to" (see ad-) + vailen "to avail," from vaill-, present stem of valoir "be worth," from Latin valere (see valiant). Related: Availed; availing. As a noun, from c. 1400.

1. His efforts were to no avail.

他徒勞無功。

來自柯林斯例句

2. I apologized repeatedly, but to little avail.

我一再道歉，但絲毫沒有奏效。

來自柯林斯例句

3. We tried to keep him alive but to no avail.

我們全力搶救他,但卻徒勞無功.

來自《簡明英漢詞典》

4. They tried artificial respiration but it was of no avail.

他們試做人工呼吸,可是無效.

來自《簡明英漢詞典》

5. They entreated and threatened, but all this seemed of no avail.

他們時而懇求,時而威脅, 但這一切看來都沒有用.

來自《簡明英漢詞典》