po po

The story

1. Cantonese · borrowed from婆婆“maternal grandmother”
2. Mandarin · borrowed from婆婆“husband's mother”
3. English todaypo po

Borrowed from Mandarin 婆婆 (pópo, “husband's mother”), Cantonese 婆婆 (po⁴ po⁴⁻², “maternal grandmother”).