泰水

tàishuǐ
  1. (literary) mother-in-law
  2. wife's mother

CEDICT

literary

Entry Composition

1 泰 tài
  1. safe
  2. peaceful
  3. most
  4. grand
2 水 shuǐ
  1. water
  2. (after a name) ... River
  3. to swim (used mostly in 會水 huìshuǐ and 水性 shuǐxìng)
  4. (coll.) lacking in substance; shoddy
  5. (bound form) additional cost; extra income
  6. classifier for washings of a garment