The Chinese word for nappy is
尿布

niào bù

Chinese Definition

Components
尿
1. urine
2. to urinate; to pee
3. (dialectal Mandarin, Jin) to pay attention to someone
4. (dialectal Mandarin) to yield to; to give up; to admit defeat
5. (Tianjin) to fear; to be afraid of (the other party in a fight)
6. (Tianjin) to lose heart; to be discouraged; to be cowardly
7. (Tianjin) courage; guts
8. (Ürümqi Mandarin) smug; cocky; pleased with oneself
9. (colloquial) urine
10. (colloquial) to urinate; to pee
11. (dialectal Mandarin) bad; spineless; poor; damned
12. (Wuhan) to fail; to break down
13. (Wuhan) ugly; plain-looking
14. (Wuhan) wantonly; arbitrarily; carelessly
布
1. cloth; textiles
棉布 - cotton cloth
2. to announce; to proclaim
宣布 - to declare, to proclaim, to announce
3. to spread
遍布 - to be found everywhere, to be spread all over
烏雲密布 - overcast
老人臉上布滿了皺紋。 - The old man's face is full of wrinkles.
4. to deploy; to set out
布署 - to lay out; to deploy
布下圈套 - to set up a trap