No
adverb
(a negative used to express dissent, denial, or refusal, as in response to a question or request)
(used to emphasize or introduce a negative statement):
Not a single person came to the party, no, not a one.
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adjective
not a (used before a noun to convey the opposite of the noun’s meaning):
She’s no beginner on the ski slopes.
noun,plural noes, nos.
an utterance of the word “no.”
a denial or refusal:
He responded with a definite no.

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