女 grounds 奶 in motherhood; 乃 — itself an ancient pictograph tied to nursing — gives the sound. One character covers the milk, the breast that gives it, and by affectionate extension the grandmother: nourishment across generations.
奶奶 grandma is often a Chinese child's primary caretaker — the national grandparent childcare system has no formal name but raises half the country. 奶茶 milk tea conquered the beverage world: bubble tea queues are 奶茶's empire.
The woman 女 who nourishes — MILK, and the grandma who pours it.
奶茶自由 'milk-tea freedom' — earning enough to buy bubble tea without checking the price — is the internet's first rung of financial independence.