American Dictionary

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Definition knuckle in American English

knuckle verb

verb
/ˈnʌk(ə)l/
1

to start working hard, especially when you should have done this earlier

Example

This year’s students seem much more inclined to knuckle down to work.

Example

It’s time you knuckled down to some work.

Synonyms and related words
2

to do what someone tells you to do

Example

He wasn’t going to knuckle under to some woman.

Synonyms and related words
Definition knuckle in American English