chhah-cham插簪

to place the hairpin given by the groom

to place the hairpin given by the groom on the head of the bride-to-be (as part of an engagement ceremony)

English Wiktionary, “插簪” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%8F%92%E7%B0%AA · confidence: Medium (Wiktionary)