modify
US /ˈmɑː.də.faɪ/
UK /ˈmɑː.də.faɪ/

1.
2.
(in grammar) (of a word, phrase, or clause) describe or restrict the meaning of (another word or group of words).
:
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Adjectives modify nouns.
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In the sentence 'He ran quickly,' the adverb 'quickly' modifies the verb 'ran.'