Definitions from Wiktionary (kryptonite)

▸ noun:  (figuratively) The one weakness of something or someone that is otherwise invulnerable.
▸ noun:  (slang) Crack cocaine.
▸ verb:  To expose to, or attack with, kryptonite.
▸ verb:  (figuratively) To destroy, wreck, or ruin; to affect adversely, as Superman is affected by kryptonite.

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