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No, the word sluggishly is an adverb.
To be slow and awkward.
moved is a verb
quiet and sluggishly are adverbs
early is an adjective
Toward the end of the 26 mile race, each runner approach the steep hill very sluggishly.
"Quite" is an adverb. It's modifying the other adverb "sluggishly" which is modifying the verb "moved".