Question

l have thought over it completely.
what is adverb​

Answer 1

Answer:

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 ).

Answer 2

Completely is adverb of degree.

An adverb is a word that modifies (describes) a verb, an adjective, another adverb, or even a whole sentence.

I hope it helps you!