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Definitions from the Web

Kryptonite

Noun:

1. A fictional material from the Superman comic book series created to weaken and harm Superman.

Example sentence: Lex Luthor used kryptonite to weaken Superman and gain an advantage in their battle.

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• DC Comics Multiverse Superman: Batman V Superman

Adjective:

2. Having a disabling or inhibiting effect on someone.

Example sentence: His fear of spiders was his kryptonite, preventing him from entering the dark attic.

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