There are 3 syllables.
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.
Cautiously is an adverb.
The verb of cautiously is caution. As in "to caution someone".
i cautiously walked on the mopped floor.
Cautiously is an adverb. It modifies a verb.
That is the correct spelling of the adverb "cautiously" (carefully).
The soldier cautiously approached the oblivious guard from behind.The squirrel cautiously sniffed the food it was being offered.
The adverb is: "Cautiously"