🇬🇧🇪🇸 knuckle - nudillo : English Lesson

Meaning of "knuckle" ("nudillo"), detailed definition, and a short video lesson below.

A knuckle is the hard, bumpy part in the middle of your finger where it bends. When you make a fist, your knuckles stick out like little hills. They help your fingers bend so you can grab, hold, and wiggle things.

Watch and listen to this English flashcard to understand the word in more detail, with an easy example sentence.

I knocked on the door so softly that only my knuckle and the door knew it happened.

I bumped my knuckle on the fridge and promised it I’d never steal midnight snacks again.

I bumped my knuckle on the table and my whole hand filed a complaint to my brain.

My cat sniffed my knuckle, booped it with her nose, and then walked away like she’d done a scientific experiment.

When you crack a knuckle, the popping sound comes from tiny gas bubbles in the joint, not from your bones breaking like a cartoon skeleton.

She tapped the door with a knuckle, then curled her fingers into a fist so every knuckle showed as a small bump. A door slam hit one knuckle, and the knuckle burned with pain. She pressed the sore knuckle, then smiled at the tiny bump and opened the door, laughing.

This word is at the C2 level, which means it represents the highest mastery of English. It’s often used in specialized or highly formal contexts and helps you communicate with precision and subtlety, much like a native speaker.

Expanding your English vocabulary is one of the best ways to improve your pronunciation, spelling, and confidence in English. Watch the video above to memorize the word, understand its meaning, and see example sentences in action. Discover related words to grow your vocabulary naturally. Add words to your playlist for stress-free, effective learning—anytime, anywhere! Watch, learn, repeat.