The word "it" is not an adjective (it is a pronoun). A word is an adjective if it modifies (defines, characterizes) a noun or pronoun.
The big tent - big is an adjective
He is tall - tall is an adjective
This key - this (while arguably called a determiner) is a demonstrative adjective
Cautious IS an adjective. An adjective is an action!
probable is an adjective
Hard is an adjective.
Stable is an adjective.
Remarkable 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
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.