The word inconspicuously is an adverb.
You can easily spot adverbs as the majority of them end in the suffix -ly.
He tried to inconspicuously enter the building that he had been banned from.
The girls passed the notes inconspicuously so the teacher wouldn't notice.
furtively, inconspicuously, nervously, quietly
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.