| 单词 | jackknife |
| 释义 | jackknife /jak"nuyf'/, n. , pl. jackknives, v. , jackknifed, jackknifing, adj. n. 1. a large pocketknife. 2. Fancy Diving. a dive in which the diver bends in midair to touch the toes, keeping the legs straight, and then straightens out. v.i. 3. to bend or double over like a jackknife: The prizefighter jackknifed and fell when he was hit in the stomach. 4. (of a trailer truck) to have the cab and trailer swivel at the linkage until they form a V shape, as the result of an abrupt stop or accident. 5. (in diving) to perform a jackknife. 6. to move rapidly at an abrupt angle. v.t. 7. to cause to jackknife: The blow jackknifed the prizefighter. 8. to cut with a jackknife. adj. 9. resembling a jackknife, as in its shape, function, or manner of opening and folding. [1705-15, Amer.; JACK1 (cf. JOCKTELEG) + KNIFE] |
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