The word mysteriously is already an adverb. You can't have an adverb of an adverb.
Some example sentences are:
The passport mysteriously vanished.
She is mysteriously creepy but insanely cute.
Mysteriously is an adverb.
No the word mysteriously is not a noun. It is an adverb.
mysteriously
no, it's an adjective because it can describe a noun. mysteriously can describe a verb or other adverb, so it's an adverb.
The adverb form of "mystery" is "mysteriously." It describes an action or state that occurs in a manner that is puzzling or difficult to understand. For example, one might say, "She smiled mysteriously, leaving everyone curious about her thoughts."
quietly, carelessly, mysteriously, angrily Those are the adverbs for quiet, careless, mysterious, angry.
mysteriously. mysteriously.
That is the correct spelling of the adverb mysteriously(in a strange or unknown fashion).
The old man was mysteriously happy. Her puppy is mysteriously sick. The police were still trying to investigate the mysteriously sudden death.
The colonists who settled Roanoke Island mysteriously disappeared.
After my watch mysteriously disappeared, I tried to find out what happened to it, but to no avail.
The colonists who settled Roanoke Island mysteriously disappeared.