No, it is not. It is an adverb or a preposition (used with an object, e.g, underneath the bridge).
Underneath
Yes, it is, meaning underneath the surface. Underground can also be a noun.
He walked underneath the branches.
underneath = unterhalb
Yes, it is. Underneath, like beneath, can also be a preposition (underneath something) but can be used without an object. (e.g. He lifted the rock and looked underneath.)
NO!!! 'Circle' can be a verb ' to circle' or a common noun ' the circle'. 'circular' is the adjective.
It is an adjective.It is a an adjective.
Cautious IS an adjective. An adjective is an action!
An adjective
it is an adjective!
No. It is not an adjective. An adjective describes something.
No, it is an adverb. The adjective is clumsy.