didi
/ˈdiːdiː/noun
1- Indian an older sister or older female cousin (often as a proper name or form of address)〈印度〉姐姐; 堂姐, 表姐（常用作专有名词或称呼）：
'Just have a look at this luggage, didi.'
“看看这行李吧, 姐姐。”
1.1
- a respectful form of address to any older woman familiar to the speaker对所熟悉的年长妇女的尊称。
词源
from Hindi dīdī.