aapa
noun/ɑːpɑː/
Etymology From Urdu آپا (āpā) / Bengali আপা (apa).
1
Bangladesh, India, Pakistan, Rare A sister that is older than oneself; also used as a term of familiarity or respect toward a woman that is older.
- I am close to bhai and his wife Shaffo, whom I call aapa, who herself is a well-read person and a true soul-mate to her husband.2006, Asha Ranawa, Woman's Triumph, page 46: