閨蜜

闺蜜
guīmì
  1. (coll.) (a woman's) close female friend
  2. bestie
  3. (originally written 閨密, an abbr. for 閨中密友)

CEDICT

colloquial

Entry Composition

1 閨 guī
  1. small arched door
  2. boudoir; lady's chamber
  3. (fig.) women
2 蜜 mì honey