D defs.my
Entry 1 sense Webster, 1913

Nix

/nĭks/ · IPA /nɪks/
01 n. One of a class of water spirits, commonly described as of a mischievous disposition.
  1. 1.
    One of a class of water spirits, commonly described as of a mischievous disposition.(Teut. Myth.)
    “The treacherous nixes who entice men to a watery death.” — Tylor.