double

• n. 两倍；双精度型
• adj. 双重的；两倍的
• vi. 加倍，加倍努力；快步走
• vt. 使加倍
• adv. 双重地；两倍地；弓身地
• n. (Double)人名；(法)杜布勒；(英)道布尔

来自拉丁语duplus, 双倍，du-, 二，词源同two, -pl, 倍，词源同ply.

double

double: [13] Double comes via Old French doble or duble from Latin duplus (direct source of English duple [16]). This was a compound adjective formed from duo ‘two’ and an Indo- European element *pl- which denoted ‘folding’ (it is present also in English fold and ply). The same semantic elements went to make up English twofold, and indeed duplex (see DUPLICATE), and also Greek diplous (source of English diploma and diplomat).

The underlying meaning of doublet ‘close-fitting jacket’ [14] (borrowed from French doublet, a derivative of double) is ‘something folded’, while doubloon [17], borrowed via French doublon from Spanish doblón (a derivative of doble ‘double’) was originally a gold coin worth ‘double’ a pistole.
=> diploma, diplomat, dub, duplicate, fold, ply

double (adj.)

early 13c., from Old French doble (10c.) "double, two-fold; two-faced, deceitful," from Latin duplus "twofold, twich as much" from duo "two" (see two) + -plus "more" (see -plus). Double standard attested by 1951. Military double time (1833) originally was 130 steps per minute.

double (v.)

late 13c., "make double," from Old French dobler, from Latin duplare, from duplus (see double (adj.)). Meaning "to work as, in addition to one's regular job" is c. 1920, circus slang, from performers who also played in the band. Related: Doubled; doubling. To double up bodily is from 1814.

A blow on the stomach "doubles up" the boxer, and occasions that gasping and crowing which sufficiently indicate the cause of the injury .... [Donald Walker, "Defensive Exercises," 1840]

double (n.)

mid-14c., "amount twice as great," also "duplicate copy," from double (adj.).

1. Don't worry. We'll have you out of here double-quick.

别担心，我们会很快把你从这儿弄出去的。

来自柯林斯例句

2. The newspaper used the neologism "dinks", Double Income No Kids.

报纸使用了新词“丁克族”，即“双收入无子女”。

来自柯林斯例句

3. Both offer excellent value at around £90 for a double room.

两家的双人客房都报出了大约90英镑的超值价格。

来自柯林斯例句

4. The company is now offering to double-glaze the windows for £3,900.

该公司现在报价3,900英镑安装双层玻璃窗。

来自柯林斯例句

5. Don't try and double-cross me, Taylor, because I'll kill you.

别跟我耍花招，泰勒，要不我会杀了你。

来自柯林斯例句