Is swarmed an adverb

No, "swarmed" is not an adverb; it is the past tense and past participle form of the verb "swarm." Adverbs typically modify verbs, adjectives, or other adverbs, describing how, when, where, or to what extent something happens. In contrast, "swarmed" describes the action of a subject being surrounded or attacked by a large number of entities, such as insects or people.