No, it is an adverb.
Smoothly, quickly, and carefully are adverbs.
"More carefully", and "most carefully".
more carefully, most carefully
more carefully, most carefully
more carefully, most carefully
most carefully
Carefully is the adverb of careful.Listen carefully I won't tell you again. (adverb)
The opposite of carefully is carelessly.Both carefully and carelessly are adverbs.
'[Someone] has executed the plan carefully.' For example: 'The engineer has executed the plan carefully.' 'Her boss has executed the plan carefully.' 'I have executed the plan carefully.'
She washed the crystal vase and carefully placed in on the shelf. Carefully, he crossed the rickety bridge. Pack the dishes carefully so they don't break. Remove the sticker carefully or it will rip.
"I carefully placed the cup of water on the table." "Please put the cup of water on the table carefully." "Read your assignment carefully."
Comparative: more carefully Superlative: most carefully