IPA: //ˈsliːp.wɛr//
KK: /ˈslipˌwɛr/
Clothing designed to be worn while sleeping, such as pajamas or nightgowns.
She put on her favorite sleepwear before going to bed.
Sleepwear → It is formed from "sleep" (from Old English *slæpan*, meaning to rest or slumber) and "wear" (from Old English *werian*, meaning to carry or to wear). The word "sleepwear" refers to clothing specifically designed to be worn while sleeping.
Think of 'sleep' as the time when you rest and 'wear' as the clothes you put on. So, sleepwear is simply the clothes you wear for sleeping.