* Verb: "Swiftly" is not a verb. It doesn't describe an action.
* Noun: "Swiftly" is not a noun. It doesn't name a person, place, or thing.
* Adjective: "Swiftly" is not an adjective. Adjectives describe nouns, and "swiftly" describes how something is done.
* Adverb: "Swiftly" is an adverb. It modifies verbs, adjectives, or other adverbs to describe how, when, where, or to what extent something happens.
Examples:
* Verb: "She ran swiftly." ("Swiftly" describes how she ran).
* Adjective: "The swift wind blew the leaves away." ("Swift" describes the wind).
* Adverb: "He spoke very swiftly." ("Swiftly" describes how quickly he spoke).