Definition of knuckle down in English:

knuckle down

  • Apply oneself seriously to a task.
    More example sentences
    • However, when there is work to be done he insists that you knuckle down and we know the time to be serious.
    • I have to give him credit for really knuckling down to his training and he cannot wait to get back into the ring.
    • I at least had the satisfaction of startling the idiot out of his numb trance before I knuckled down to the task at hand.
See parent entry: knuckle

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Word of the day kerf
Pronunciation: kəːf
noun
a slit made by cutting with a saw