nix

Short definition from Wiktionary

Noun

1. 1
   Nothing.
2. 2
   A treacherous water-spirit

Verb

1. 1
   To make something become nothing; to reject or cancel.
2. 2
   To destroy or eradicate.

Interjection

1. 1
   No! Not at all!
2. 2
   A warning cry when a policeman or schoolmaster etc. was seen approaching.

Proper noun

1. 1
   One of the moons of Pluto (named 21 June 2006.)
2. 2
   A surname originating as a patronymic.