knuckle
[verb]
Synonyms: yield, bow, buckle (under), capitulate, cave, defer, knuckle under, submit, succumb

[TahlilGaran] English Synonym Dictionary ▲

I. knuck‧le¹ /ˈnʌkəl/ noun [countable]
[Date: 1300-1400; Language: Middle Low German; Origin: knökel 'small bone, knuckle']

1. your knuckles are the joints in your fingers, including the ones where your fingers join your hands:
Her knuckles whitened as she gripped the gun.

2. a piece of meat around the lowest leg joint of a pig:
a knuckle of pork

3. near the knuckle British English informal rude, or likely to give offence:
Some of his jokes are a bit near the knuckle.
⇒ a rap on/over the knuckles at rap¹(6), ⇒ rap somebody on/over the knuckles at rap²(5)

[TahlilGaran] Dictionary of Contemporary English ▲

II. knuckle² verb
knuckle down phrasal verb informal
to suddenly start working or studying hard Synonym : get down to:
If he doesn’t knuckle down soon, he’ll never get through those exams.
knuckle down to
He is clearly ready to knuckle down to the task.
knuckle under phrasal verb informal
to accept someone’s authority or orders although you do not want to

[TahlilGaran] Dictionary of Contemporary English ▲

knuckle
noun
ADJ. bony | bleeding, bloodied, bruised, grazed, swollen
VERB + KNUCKLE crack He rubbed his hands together, cracking his knuckles as he tried to control his anger.
bruise, graze, scrape, skin
KNUCKLE + NOUN bone
PHRASES rap sb on/over the knuckles (figurative) The Assistant Manager was rapped over the knuckles for criticizing the company in the press.

[TahlilGaran] Collocations Dictionary ▲

knuckle
ˈnʌkl
See: buckle down or knuckle down , rap one's knuckles

[TahlilGaran] English Idioms Dictionary ▲