adjective
a word that describes a noun or pronoun, in this case, 'allergic' describes a person who has an allergy or sensitivity to something
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She is allergic to peanuts and must be careful when dining out.
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I'm allergic to cats, so I can't come over to your place if you have one.
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I can't eat shellfish, I'm allergic AF.
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He's allergic to hard work, always finding excuses to avoid it.