Yes, it is a descriptive adjective. It is the superlative form of the adjective "firm."
firmest
cooking (or culinary) apples are firm and on the tart side.
A company called Cloud makes a very firm mattress pad.
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!
"Latex pillows are the firmest of the pillows. They are usually molded or shaped to relieve pressure points, whereas feather pillows are soft and easily mold to the shape you desire."
No, it is an adverb. The adjective is clumsy.
It can be. "Ideal" is an adjective and a noun.