From WordNet (r) 3.0 (2006):
nix
n 1: a quantity of no importance; "it looked like nothing I had
ever seen before"; "reduced to nil all the work we had
done"; "we racked up a pathetic goose egg"; "it was all for
naught"; "I didn't hear zilch about it" [syn: nothing,
nil, nix, nada, null, aught, cipher, cypher,
goose egg, naught, zero, zilch, zip, zippo]
v 1: command against; "I forbid you to call me late at night";
"Mother vetoed the trip to the chocolate store"; "Dad nixed
our plans" [syn: forbid, prohibit, interdict,
proscribe, veto, disallow, nix] [ant: allow,
countenance, let, permit]