Stealthily is an adverb. The ending "-ly" gives a strong indication of its part of speech.
part of speech
Adjective
What part of speech is thaw
The part of speech for oscillate is verb.
An adjective is a part of speech.
The word "stealthily" is an adverb. It describes how an action is performed, in a secretive or cautious manner.
"Ghost" can be both a noun and a verb. As a noun, it refers to the spirit of a dead person. As a verb, it means to move silently and stealthily.
I entered the room stealthily, hoping to remain unnoticed.
He stealthily snuck into the clock tower known as Big Ben
part of speech
The part of speech for this particular word is a noun.
stealthily
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The sniper crept stealthily through the bushes, trying to remain unnoticed.
The part of speech for "explicit" is an adjective.