the.com/knuckle
the hinge that lets you wave hello or threaten violence with the same hardware
means A finger joint, especially the rounded bony part on the back of the hand where a finger meets the palm.
from From late Middle English 'knokel,' meaning a small bone or joint — likely a diminutive built from the same Germanic stock that gave Dutch 'knokkel' and German 'Knöchel' (ankle, bone). It carried the general sense of any rounded knob of bone before the hand-joints won the word for themselves. The phrase 'knuckle down' comes from old marbles games, where you literally pressed your knuckles to the ground before a shot.
- phantom sound
- cracking is gas bubbles bursting in joint fluid
- old myth busted
- cracking doesn't cause arthritis, studies confirm
- word origin
- originally meant any joint, including knees
- brass version
- banned weapon in many states and countries
- sandwich slang
- a knuckle sandwich is a punch to the mouth
knuckle sandwich — a punch to the face, popularized in 1950s slang and boxing culture
white knuckle — gripping something intensely with pale knuckles, like holding an airplane armrest during turbulence
knuckle down — a marble shooting technique where the shooter's knuckle touches the ground for aim, used in competitive marbles since the 1800s