crack

• vt.破裂する；開く；切り刻む
• vi. 破裂する
• n. ひびが入る；音が変わる；ひびが入る
• adj.

オノマトペ。

crack

crack: [OE] Old English had the verb cracian ‘make a sudden sharp noise’, but English did not acquire the noun crack until the 14th century. Both are of Germanic origin (modern German has the related krachen, for instance, and Dutch has kraken), and the verb’s hypothetical ancestor can be reconstructed as *krakojan. The notion of ‘sudden sharp noise’ is semantically primary (presumably it was originally onomatopoeic), and the prevalent modern sense ‘fissure’ arises from the connection between the noise of something breaking and the resultant line of fracture.
=> crock

crack (v.)

Old English cracian "make a sharp noise," from Proto-Germanic *krakojan (cognates: Middle Dutch craken, Dutch kraken, German krachen), probably imitative. Related: Cracked; cracking. From early 14c. as "to utter, say, speak, talk," especially "speak loudly or boastingly" (late 14c.). To crack a smile is from 1835, American English; to crack the whip in the figurative sense is from 1886.

crack (n.)

"a split, an opening," mid-15c., earlier "a splitting sound; a fart; the sound of a trumpet" (late 14c.), probably from crack (v.). Meaning "rock cocaine" is first attested 1985. The superstition that it is bad luck to step on sidewalk cracks has been traced to c. 1890. Meaning "try, attempt" first attested 1830, nautical, probably a hunting metaphor, from slang sense of "fire a gun."

At their head, apart from the rest, was a black bull, who appeared to be their leader; he came roaring along, his tail straight an end, and at times tossing up the earth with his horns. I never felt such a desire to have a crack at any thing in all my life. He drew nigh the place where I was standing; I raised my beautiful Betsey to my shoulder, took deliberate aim, blazed away, and he roared, and suddenly stopped. ["A Narrative of the Life of David Crockett, Written by Himself," Philadelphia, 1834]

Adjectival meaning "top-notch, superior" (as in a crack shot) is slang from 1793, perhaps from earlier verbal sense of "do any thing with quickness or smartness" (Johnson). Grose (1796) has "THE CRACK, or ALL THE CRACK. The fashionable theme, the go." To fall through the cracks figuratively, "escape notice," is by 1975.

1. The drug is variously known as crack or freebase.

という麻薬の呼び方はさまざまで、 crack と呼ぶ人もいれば、freebase. と呼ぶ人もいる。

2.She 's calm and strong，and she is just not going to crack .

彼女は落ち着いていて強く、決して崩れない。

3.In severe cases，the skin can crack and weep.

悪い条件下では、皮膚が裂けて膿が出る可能性があります。

4.Drug experts say it could spell the end of the crack epidemic.

麻薬専門家は、強力なコカイン吸引氾濫の局面を終わらせる可能性があると述べている。

5.He went to the door，opened it a crack ，and listened.

彼はドアに向かって歩き、ドアの隙間を開けて聞いていた。