| 词汇 | knuckle |
| 词根词缀 | 词源： late 14c., knokel "finger joint," common Gmc. (cf. M.L.G. knökel, M.Du. cnockel, Ger. knöchel), lit. "little bone," a dim. of P.Gmc. root *knuck- "bone" (cf. Ger. Knochen "bone). To knuckle down "apply oneself earnestly" is 1864 in Amer.Eng., extended from game of marbles; to knuckle under is first recorded 1740. Knuckle-duster is from 1858; knucklehead "stupid person" first recorded 1944. Knuckleball, type of baseball pitch, is from 1927. |
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