Mouse can be a noun or a verb.
As a noun: "A mouse is a rodent."
As a verb: "Now, mouse over to the icon and double click."
noun
The word mice is a noun. It is the plural form of the word mouse.
part of speech
The part of speech for this particular word is a noun.
adverb
what part of speech is work
what part of speech is beneath
Mouse
Sashay is a verb. It means to walk in an exaggerated, showy manner, often with hip swaying.
"Did not" or "didn't" is a contraction of the auxiliary verb "did" and the adverb "not," forming a negative past tense construction in English.
Adjective
The word speech is a noun.