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)

CEDICT

Entry Composition

1 大 dà
  1. big; large; great
  2. older (than another person)
  3. eldest (as in 大姐 dàjiě)
  4. greatly; freely; fully
  5. (dialect) father
  6. (dialect) uncle (father's brother)
2 姨 yí
  1. mother's sister
  2. aunt