A type of mythological sea creature or sea monster; also, a water sprite; a nix or nixie; a mermaid or merman.

(euphemistic, vulgar, derogatory, offensive, ethnic slur) the word nigger.

A finely divided nickel-aluminum alloy that has been treated with NaOH to dissolve out most of the aluminum.

A surname originating as a patronymic.

Alternative spelling of knick-knack

(US, idiomatic, colloquial) Small time; operating on a small scale; involving small amounts of money; petty or cheap.

(US, idiomatic, colloquial) To charge, or be charged, several unexpected small amounts of money, often in the form of fees, taxes, or related expenses to a venture, which when taken as a whole add up to a significant unexpected cost.

(US, slang) Fifteen years.

Containing nickel. / (chemistry) Containing trivalent nickel.

Containing nickel. / (chemistry) Containing bivalent nickel.