The word 'trilogic' is not a word in English.
The words trilogic and trilogical exist, but they are very rare and unidiomatic, and you would do well to avoid them. Offhand I can't think of any circumstance where you could not use the noun trilogy rather than a phrase such as trilogic work.
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."