I am guessing you meant to write self-centered if so then yes it is an adjective
No, it is a verb or a noun (to go around, to surround; a round shape). The adjective form is circular.
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
It is not an adjective. It is a noun based on the adjective unfit.
No, it is not an adjective; it is an adverb. The adjective form is "awkward."
Yes, it is an adjective.