adverb
US /ˈæd.vɝːb/
UK /ˈæd.vɝːb/

1.
a word or phrase that modifies or qualifies an adjective, verb, or other adverb or a word group, expressing a relation of place, time, circumstance, manner, cause, degree, etc. (e.g., gently, quite, then, there).
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In the sentence 'She sings beautifully,' 'beautifully' is an adverb.
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Common adverbs include words ending in -ly, such as 'quickly' and 'slowly'.