What part of speech is the word “quickly”? 

Ans: Quickly" is an Adverb.

Key Points

• Adverbs modify verbs, adjectives, or other adverbs. "Quickly" describes how an action is performed. For example, in the sentence "He ran quickly," "quickly" modifies the verb "ran."

Important Points

• Adverbs Modify: Adverbs are words that modify verbs, adjectives, or other adverbs. They provide information about how, when, where, or to what extent something is done, 1 described, or happens.   
• "Quickly" Modifies Verbs: In the example "He ran quickly," the adverb "quickly" modifies the verb "ran." It tells us how he ran. Other examples:

Additional Information

• Adverbs and Their Function: Adverbs are words that modify verbs, adjectives, or other adverbs. Their primary role is to provide more information about the action, description, or circumstance.
• "Quickly" as a Modifier: In the sentence "He ran quickly," the word "quickly" modifies the verb "ran." It describes how he ran. This is the defining characteristic of an adverb.