No. It is a noun. It is a rather esoteric noun meaning 'roving about in the night' (as suggested by its similarity to the adjective nocturnal).
NO!!! 'Circle' can be a verb ' to circle' or a common noun ' the circle'. 'circular' is the adjective.
It is an adjective.It is a an adjective.
An adjective
it is an adjective!
No. It is not an adjective. An adjective describes something.
Cautious IS an adjective. An adjective is an action!
No, it is an adverb. The adjective is clumsy.
It can be. "Ideal" is an adjective and a noun.
adjective
No, it is not an adjective; it is an adverb. The adjective form is "awkward."
It is not an adjective. It is a noun based on the adjective unfit.
Yes, it is an adjective.