Stealthily is an adverb. The ending "-ly" gives a strong indication of its part of speech.
quickly and quietly
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
stealthily
The cat moved stealthily through the dark hallway, its steps silent and its movements careful to not disturb anything.
The part of speech for "answer" is a noun.
heimlich
secretly, stealthily,
part of speech
The part of speech for this particular word is a noun.
Stealthily is the adverb form for stealth. Stealthy is the adjective form. The cat moved stealthily. The cat was stealthy.