nappy
noun
ˈnæpi 
ˈnæpi a piece of soft cloth or other thick material that is folded around a baby's bottom and between its legs to absorb and hold its body waste
I'll change her nappy.a disposable nappy (= one that is made to be used once only)nappy rash
Usage note: ChildrenHaving a baby/childwant a baby/a child/kidsstart a familyconceive/be expecting/be going to have a baby/childmiss your periodbecome/get/ be/find out that you are pregnanthave a baby/a child/kids/a son/a daughter/twins/a familyhave a normal/a difficult/an unwanted pregnancy; an easy/a difficult/a home birthbe in/go into/induce labour (especially US) laborhave/suffer/cause a miscarriagegive birth to a child/baby/daughter/son/twinsParentingbring up/(especially North American English) raise a child/familycare for/(especially British English) look after a baby/child/kidchange (British English) a nappy/(North American English) a diaper/a babyfeed/breastfeed/bottle-feed a babybe entitled to/go on maternity/paternity leavego back/return to work after maternity leaveneed/find/get a babysitter/good quality affordable childcarebalance/combine work and childcare/child-rearing/family lifeeducate/teach/home-school a child/kidpunish/discipline/spoil a child/kidadopt a baby/child/kidoffer a baby for/put a baby up for adoption(especially British English) foster a child/kidbe placed with/be raised by foster parents