Where does “sleepingwear” come from?

sleepingwear (English) comes from English sleeping, from English sleep, from Middle English slepen, from Old English slǣpan, from Proto-West Germanic slāpan, from Proto-Germanic slēpaną, from Proto-Indo-European slab- — to be weak, be languid; be weak, limp, languid.

Ancestry of “sleepingwear”, step by step

sleepingwear traces back through two separate lines of ancestry.

via English sleeping

StepLanguageWordMeaning
1Englishsleepingpresent participle of sleep; Asleep; Used for...
2EnglishsleepTo rest in a state of reduced consciousness; To...
3Middle Englishslepento sleep; to become asleep, to cause to sleep; to...
4Old Englishslǣpan
5Proto-West Germanicslāpanto sleep
6Proto-Germanicslēpanąto sleep
7Proto-Indo-Europeanslab-to be weak, be languid; be weak, limp, languid

via English Wear

StepLanguageWordMeaning
1EnglishWearThe cities of Durham and Sunderland are situated upon its grand banks
2Middle EnglishwerenPlural past indicative form of been; Plural...
3Old Englishwerianto wear; to defend, protect
4Proto-West Germanicwaʀjanto clothe
5Proto-Germanicwarjanąto ward off, to defend against; to thwart, to...
6Proto-Indo-Europeanwēr-true
7Proto-Indo-Europeanwer-to burn; to cover, heed, notice; squirrel
Every word from Proto-Indo-European slab-
sleepingwear — Etymology, Origin & Word History | Etymology Explorer