单词只背一遍0045｜雅思核心单词avail

En

今日单词  ，今日毕

此时不背，更待何时

英 [əˈveɪl]  美 [əˈveɪl]

v. 有助于；（使）对某人有利

n. 效用，利益

[ 复数 avails 过去式 availed 过去分词 availed 现在分词 availing 第三人称单数 avails ]

1. PHRASE If you do something to no avail or to little avail, what you do fails to achieve what you want. 徒劳 [书面]

例：

His efforts were to no avail.

他的努力是徒劳的。

2. V-T If you avail yourself of an offer or an opportunity, you accept the offer or make use of the opportunity. 利用 [正式]

例：

Guests should feel at liberty to avail themselves of your facilities.

客人们应可以随意使用你们的设施。

【中文词源】：

前缀a-同ad-, 去，往. 词根val, 力量，词源同value, valiant. 指有益的，有力量的。

【英语词源】：

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.词根：-val-

【词根含义】：强壮;价值

【词根来源】：来源于拉丁语动词valeo, valere, valui, valitus(强壮,价值)。

【同源单词】：avail, available, countervail, devaluate, devaluation

2.前缀：a-

【词根含义】：在,到;来,临近;离开;否定;副词前缀;加强意义

【词根来源】：来源于古英语和中古英语a-, an, on。

【同源单词】：aboard, abroad, acentric, across, ago

3.词根词缀：valid-, val-, vale-, -vail, -valent, -valence

【来源及含义】Latin: valere, to be strong, to be well, to be worth; strong; power, strength; and "fare well" [go with strength]

【同源单词】Ab abusu ad usum non valet consequentia, Ab actu ad posse valet illatio, ad valorem, Aeternum vale, ambivalence, ambivalent

vi. 有用，有利

be of help , have it

vt. 有利，有用

have it , to advantage

n. 效用，利益

behalf , utility , benefit , sake , profit