* Adjective: When it describes a noun, it acts as an adjective.
* Example: "I wear my everyday clothes to the gym." (Describing the clothes)
* Adverb: When it modifies a verb, adjective, or another adverb, it functions as an adverb.
* Example: "I go to the gym everyday." (Modifying the verb "go")
It's important to consider the context to determine which part of speech "everyday" is functioning as.