音标：[inˈvælidz] ；

n. 病人, 残疾者( invalid的名词复数 )

n someone who is incapacitated by a chronic illness or injury
v force to retire, remove from active duty, as of firemen
v injure permanently

invalid的用法和样例：

例句

用作形容词(adj.)

A passport that is out of date is invalid.护照过期是无效的。
Unless a check is signed, it is invalid.支票除非签了名，否则是无效的。
She looks after her invalid mother.她照看病弱的母亲。

用作名词(n.)

Nobody looks after the invalid.没人照顾这个病人。
He never fully recovered, and had to spend the rest of his life as an invalid.他没能完全康复，于是不得不成了一名残疾者度过余生。

用作及物动词(vt.)

He was invalided out of the army because of the wounds he received.他因负伤而退役。
Ambassador decided that he must invalid his sick radio-officer home.大使决定把患病的无线电报员遣送回国。

常见句型

用作形容词(adj.)

用作定语～+ n.

This is an invalid assumption.这是一个无根据的假设。
He had to look after his invalid brother.他不得不照看他有病的弟弟。

用作表语S+be+～

Their marriage is invalid.他们的婚姻是无效的。

用作名词(n.)

He will visit an invalid.他将要去看望一个病人。
Her grandfather is an invalid.她的祖父是一个残疾人。

词汇搭配

用作形容词 (adj.)

～+名词

invalid argument没有根据的论点
invalid person有病的人

名词+～

marriage invalid婚姻无效

用作名词 (n.)

动词+～

visit an invalid看望病人

形容词+～

bedridden invalid卧床不起的病人
permanent invalid长期病人

经典引文

He declared the wills technically invalid because of some legal flaw.
出自：R. Graves
His invalid son, who had just suffered his first attack of epilepsy.
出自：J. Barnes
Wounded in the lung and..invalided out of the army with TB.
出自：M. Scammell

【近义词】

infirm体弱的
weak弱的
unhealthy不健康的
void空的
patient有耐心的
ineffective无效的
frail脆弱的
debilitated虚弱的
sickly病弱的
null and void[法律]无效
unacceptable不能接受的
untrue不真实的
unfounded无事实根据的...
illogical不合逻辑的
enfeebled动词enfeeble的过...
convalescent恢复期的
validate使生效
feckless软弱的
incapacitate使不能
handicap障碍
disable使 ... 失去能力...
shut-in卧病在家的人...

【反义词】

valid有效的

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