An adverb adds something to the meaning of a:

Solution

An adverb is a word that modifies or adds more information to the meaning of a verb, adjective, or other adverb. An adverb provides information about the manner, time, place, degree, frequency, or certainty of an action or state described by a verb. For example: He speaks softly. (The adverb "softly" modifies the verb "speaks" by indicating how he speaks.) She is very beautiful. (The adverb "very" modifies the adjective "beautiful" by indicating the degree of beauty.)