English Expressions Using the Word KNUCKLE

Here are some expressions using the word KNUCKLE:


1. Knuckle down (verb)

Meaning: to make a great effort

I’ve got my exams next week and I haven’t done much work, so I’d better knuckle down.


2. Knuckle under (verb)

Meaning: to submit to authority

The teacher made the students knuckle under and hand their projects in on time.


3. Rap on the knuckles (idiom)

Meaning: to be punished or reprimanded, not too severely, but to remind not to do that again.

Ryan got a rap on the knuckles for leaving the kitchen in a mess.


4. Knucklehead (noun)

Meaning: a stupid person

I’d like to get my hands on the knucklehead who designed that paper-towel dispenser.


5. Knuckle sandwich (idiom)

Meaning: a punch in the mouth

If he keeps bugging me, he surely will get my knuckle sandwich!


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