Yes, negative is playable
...and is worth 15 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Negative" Definition
noun
A feature or characteristic that is not deemed positive, affirmative, or desirable: "As voters get to know his liberal views, his negatives will rise” ( Richard M. Nixon).
A film, plate, or other photographic material containing such an image.
A statement or act indicating or expressing a contradiction, denial, or refusal.
A statement or act that is highly critical of another or of others: campaign advertising that was based solely on negatives.
An image in which the light areas of the object rendered appear dark and the dark areas appear light.
verb
To reject by or as if by a vote.
To demonstrate the falsity of.
To deny the truth, reality, or validity of.
adjective
Biology Moving or turning away from a stimulus, such as light: a negative tropism.
Chemistry Of or relating to an ion, the anion, that is attracted to a positive electrode.
Expressing, containing, or consisting of a negation, refusal, or denial: gave a negative answer to our request.
Gloomy; pessimistic: a negative outlook.
Hostile or disparaging; malicious: ran a negative campaign against her opponent.
verb-transitive
To counteract or neutralize.
To demonstrate to be false; disprove.
To refuse to approve; veto.
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