A knuckle is located on the hand. It’s the joint at the base of each finger.
​The plural is ‘knuckles’.

FUN FACT – The ‘k’ inthe word knuckle is silent. Just to confuse you all even more… we have many silent letters in English.

idioms with the body part ‘knuckle’

Let’s look at some popular body idioms that contain the word ‘knuckle’. It’s time to knuckle down and learn some idioms.


I’ve added the meaning and a picture example too.

idiomatic expressions with body parts - knuckle
body idioms and expressions in English KNUCKLE - knuckle sandwich
body idioms and expressions in English KNUCKLE - rap someone on the knuckles
body idioms and expressions in English KNUCKLE - white-knuckle ride
body idioms and expressions in English KNUCKLE - knuckle down