In the sentence "She just barely made it on time," what is the part of speech for the word "barely"?

The word "barely" functions as an adverb in the sentence "She just barely made it on time." Adverbs modify verbs, adjectives, or other adverbs and often describe how, when, or to what extent an action is performed. In this case, "barely" modifies the verb "made," indicating the manner in which she made it on time—it emphasizes that she was almost late and just managed to arrive punctually. This use of "barely" illustrates its role in providing additional context and meaning to the action, which is characteristic of adverbs.