Cautiously is an adverb. It modifies a verb.
adverb
That is the correct spelling of the adverb "cautiously" (carefully).
what part of speech is beneath
i want to know what part of speech is camping
The part of speech is a adjective
The word "cautiously" is an adverb. It modifies a verb (e.g., walk cautiously) or another adverb or adjective (e.g., speak very cautiously).
most cautiously
more cautiously, most cautiously
I entered the unlit room cautiously. The boy cautiously tested the water.
The two adverbs are "somewhat" and "cautiously."Cautiously modifies entered and somewhat modifies cautiously.
He cautiously approached the source of the noise.The cat cautiously poked her head out the cupboard.Please walk very cautiously, the floor is wet.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
i cautiously walked on the mopped floor.