That would be an adjective
"Professionally" is an adverb. It is used to describe how something is done in a professional manner.
Can refer to many things, usually a shorter way to write professional.
It is an adverb because it tells when the verb occured.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "twirl" is a verb.
The part of speech for "explicit" is an adjective.