姑姥姥

gūlǎolao
  1. mother's father's sister (coll.)
  2. great aunt

CEDICT

colloquial

Entry Composition

1 姑 gū
  1. paternal aunt
  2. husband's sister
  3. husband's mother (old)
  4. nun
  5. for the time being (literary)
2 姥姥 lǎolao
  1. (coll.) mother's mother
  2. maternal grandmother