No. How is an adverb, also used as a conjunction. Rarely it is also used as a noun.
It is widely used in interrogative sentences ("How do you use this word?").
Cautious IS an adjective. An adjective is an action!
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
Severe is an adjective.
Hard is an adjective.
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.
No, it is not an adjective. Differently is an adverb.The adjective would be different.
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.
Yes, it is an adjective.
No it's not a adjective, an adjective is a describing word.
It is not an adjective. It is a noun based on the adjective unfit.
adjective
No, it is not an adjective; it is an adverb. The adjective form is "awkward."