What part of speech is the word alone?

The Word "alone" can function as both an adverb and an adjective, depending on how it is used in a sentence. As an adverb, "alone" modifies a verb, an adjective, or another adverb, indicating that something is happening or being done without anyone or anything else present. As an adjective, "alone" describes a noun, indicating that something or someone is isolated or without companionship.