'knuckle under' definitions:

Definition of 'knuckle under'

From: WordNet
verb
Consent reluctantly [syn: yield, give in, succumb, knuckle under, buckle under]

Definition of 'knuckle under'

From: GCIDE
  • knuckle under \knuc`kle un"der\, v. i. To yield; to submit; -- usually used with to. [PJC]

Synonyms of 'knuckle under'

From: Moby Thesaurus