大姨子

dàyízi
  1. sister-in-law
  2. wife's older sister

CEDICT

sister-in-law (wife's elder sister)

Wiktionary

称谓。用以称妻子的姊姊。

重編國語辭典

Entry Composition

1 大姨 dàyí
  1. aunt (mother's eldest sister)
  2. (respectful term of address for a woman who is about the age of one's mother)
2 子 zi noun suffix, as in 椅子 yǐzi "chair"

Related entries

大嫂 dàsǎo
  1. older brother's wife
  2. sister-in-law
  3. elder sister (respectful appellation for an older married woman)
姨妹 yímèi
  1. wife's younger sister
  2. sister-in-law
姨姐 yíjiě
  1. wife's elder sister
  2. sister-in-law
嫂嫂 sǎosao
  1. older brother's wife
  2. sister-in-law
  3. (polite address to a younger married woman) sister
弟妇 dìfù
  1. younger brother's wife
  2. sister-in-law
大姑 dàgū
  1. father's oldest sister
  2. husband's older sister
  3. sister-in-law