細姨 [细－]

Jyutping sai3 ji1
Pinyin xì yí

Definitions (CC-CEDICT)
  1. concubine
Definitions (Wiktionary)
  1. noun, Min-Dong, Teochew
    sister-in-law (wife's younger sister)
  2. noun, Hakka, Hokkien, dialectal, obsolete
    concubine
  3. noun, Cantonese
    youngest maternal aunt (mother's youngest sister)