knuckle به انگلیسی
From Longman Dictionary
knuck‧le /ˈnʌkəl/ noun [countable]
your knuckles are the joints in your fingers, including the ones where your fingers join your hands
a piece of meat around the lowest leg joint of a pig
Example
Her knuckles whitened as she gripped the gun
a knuckle of pork
Susan saw a smear of yellow paint across his knuckles
Karma Rubbish smokes at the end of the garden, cracking its knuckles to pass the time
The power of the punch is concentrated in a small area of the knuckles