kryptonite

word

Definition

A fictional green mineral from the Superman comics that weakens Superman; commonly used to mean something that is someone's weakness.

Usage & Nuances

Originally from comic books, now often used metaphorically in casual conversation to refer to one's main weakness or vulnerability (e.g., 'Chocolate is my kryptonite'). Usually informal or playful.

Example Sentences

Superman cannot touch kryptonite.

basic

For Superman, kryptonite is dangerous.

basic

Many fans know about kryptonite from the comics.

basic

Chocolate is definitely my kryptonite—I just can't resist it!

natural

He’s a great worker, but early mornings are his kryptonite.

natural

Math used to be my kryptonite, but now I enjoy solving problems.

natural