老奶奶

1. • father's father's mother

     coll.

2. • paternal great-grandmother
3. • respectful form of address for an old woman

Character by character

• 老(lǎo)prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity
• 奶(nǎi)breast
• 奶(nai)breast