knuckle down meaning

Definition of knuckle down

1. work very hard, like a slave

   Synonyms: slave, break one's back, buckle down

   Type of: work

knuckle down in a sentence

• You'd better knuckle down to work.

How to pronounce knuckle down

knuckle down is pronounced /ˈnʌkəl daʊn/ in American English. It has 3 syllables.