knuckle down

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English[edit]

Etymology[edit]

1864 in American English, from the game of marbles.

Verb[edit]

to knuckle down (third-person singular simple present knuckles down, present participle knuckling down, simple past and past participle knuckled down)

  1. (intransitive, chiefly UK, idiomatic) To get to work; to focus on a task.
    You should knuckle down and do your homework!

See also[edit]