Adjective:
* It describes a noun: "I woke up early this morning." (Describes the noun "morning")
Adverb:
* It modifies a verb, adjective, or another adverb:
* "The train arrived early." (Modifies the verb "arrived")
* "It was an early decision." (Modifies the adjective "early")
* "She left very early." (Modifies the adverb "early")
So, the word "early" is versatile and can act as both an adjective and an adverb.