I. nix 1 /nɪks/ BrE AmE verb [transitive] American English informal
to answer no to something or say that you will not allow something:
They nixed the idea of filming in Ireland.
II. nix 2 BrE AmE adverb American English old-fashioned
[ Date: 1800-1900 ; Origin: nix 'nothing' (18-21 centuries) , from German nichts ]
no