pronoun
Not any thing; no thing.
An absence of anything, including empty space, brightness, darkness, matter, or a vacuum.
noun
Something trifling, or of no consequence or importance.
A trivial remark especially in the term sweet nothings.
A nobody (insignificant person).
adverb
(archaic) Not at all; in no way.
adjective
Completely unimportant.
Lacking effort or commitment.
interjection
Never mind; it's not important; forget what I said.