乾娘 [干－]

Jyutping gon1 noeng4
Pinyin gān niáng

Definitions (CC-CEDICT)
  1. adoptive mother (traditional adoption, i.e. without legal ramifications)
Definitions (粵典–words.hk)
  1. 名詞、書面語
    結拜​而​認​嘅​母​親​。
    a woman who treats someone as if he/she were her biological child
  2. 近義詞
    契娘、契媽
Definitions (Wiktionary)
  1. noun, colloquial
    adoptive mother
    (syn.) 契母, 老奶, 義娘奶, 干妈, 义奶, 義奶, 乾媽, 义娘奶