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.).
例文
1. Don 't worry.We 'll have you out of here double -quick.
心配しないで、私たちはすぐにあなたをここから出します。
2.The newspaper used the neologism "dinks "， Double Income No Kids.
新聞は、新語「ディンク族」、すなわち「二重所得に子供なし」を使用している。
3.Both offer excellent value at around ￡90 for a double room.
2軒のツインルームはいずれも約90ポンドの超過価格を報告した。
4. The company is now offering to double -glaze the windows for ￡3,900.
同社は現在、2重窓ガラスを設置するために3900ポンドを見積もっている。
5.Don 't try and double ?cross me，Taylor，because I 'll kill you.