• n. 兩倍；雙精度型
• adj. 雙重的；兩倍的
• vi. 加倍，加倍努力；快步走
• vt. 使加倍
• adv. 雙重地；兩倍地；弓身地
• n. (Double)人名；(法)杜布勒；(英)道布爾

來自拉丁語duplus, 雙倍，du-, 二，詞源同two, -pl, 倍，詞源同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.

別擔心，我們會很快把你從這兒弄出去的。

來自柯林斯例句

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

報紙使用了新詞“丁克族”，即“雙收入無子女”。

來自柯林斯例句

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

兩家的雙人客房都報出了大約90英鎊的超值價格。

來自柯林斯例句

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

該公司現在報價3,900英鎊安裝雙層玻璃窗。

來自柯林斯例句

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

別跟我耍花招，泰勒，要不我會殺了你。

來自柯林斯例句