Answer: nix

AnswerCrossword Clue
NIXVeto: sl.
NIXSlangy veto
NIXRichy ...
nixnothing
nixto veto
nixno
nixto veto (to forbid or prevent authoritatively) / a water sprite
NIXStrike out
NIXWord often spoken in pig Latin
NIXGive the thumbs down
NIX"Sticks ... Hicks Pix"
NIXNothing doing
NIXCancel, in Hollywood-speak
NIXCounterorder
NIXNo way
NIXOverrule
NIXGive thumbs down
NIXCountermand
NIXRule out
NIX"Forget it!"
NIXNegative of sorts.
NIXWord commonly translated into pig Latin
NIXI don't agree.
NIXNo: Slang.
NIXSlangy "no."
NIXWater sprite.
NIXNothing doing: Slang.
NIXSlangy negative.
NIXWater sprite in Germanic myth.
NIXWater sprite
NIXCousin of nope
NIXNothing doing!
NIXPut the kibosh on.
NIXNo soap
NIXSlangy turndown
NIXNo dice!
NIXNope
NIXSlangy refusal
NIXTurn thumbs down
NIXTurn thumbs down on