Negative

Not positive nor neutral.
(physics) Of electrical charge of an electron and related particles [from the 18th c.]
(mathematics) Of a number: less than zero
1. (weather) Less than zero degrees Celsius or Fahrenheit.
(linguistics, logic) Denying a proposition. Antonym: affirmative
Damaging; undesirable; unfavourable.
(often used pejoratively) Pessimistic; not tending to see the bright side of things.
Of or relating to a photographic image in which the colours of the original, and the relations of left and right, are reversed.
(chemistry) Metalloidal, nonmetallic; contrasted with positive or basic.
(New Age jargon, derogatory) Often preceded by emotion, energy, feeling, or thought: to be avoided, bad, difficult, disagreeable, painful, potentially damaging, unpleasant, unwanted.
Characterized by the presence of features which do not support a hypothesis.
(slang) HIV negative.
(slang) COVID-19 negative.
(hyperbolic) No, not any, zero.