rakhi
An ornamental cotton wristband tied by a girl or woman on to the wrist of her brother, or of one who takes on the responsibilities of a brother, particularly during the Raksha Bandhan festival.
Although the festival of the Rakhi had not arrived, the mother of the young prince sent Captain Tod, by the hands of the family priest, the bracelet of adoption as her brother, which made his young ward thenceforth his nephew. He had received the rakhi from, and become the "bracelet-bound brother" of, two other queens, the Ranís of Oodeypore and Kotah, besides the maiden sister of the Rana, and many ladies of chiefs of rank: these, he observes, were all the treasures he brought away.
Where it comes from
Borrowed from Hindi राखी (rākhī, “a rakhi”), from Sanskrit रक्षिका (rakṣikā, “a rakhi”), from रक्षा (rakṣā, “care, guarding, preservation, protection; a rakhi”), from Proto-Indo-European *h₂lek- (“to protect”).
Adapted from the Wiktionary entry rakhi (CC BY-SA 4.0).