| 单词 | ratchet |
| 释义 | ratchet n. & v. --n 1. a set of teeth on the edge of a bar or wheel in which a device engages to ensure motion in one direction only. 2. (in full ratchet-wheel) a wheel with a rim so toothed. --v (ratcheted, ratcheting) 1. tr. a provide with a ratchet. b make into a ratchet. 2. tr. & intr. move as under the control of a ratchet. Etymology: F rochet blunt lance-head, bobbin, ratchet, etc., prob. ult. f. Gmc |
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