Where does “sleepingly” come from?

sleepingly (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.

sleepingly (English): Sleepily; while falling asleep

Definitions

  1. Sleepily; while falling asleep

Ancestry of “sleepingly”, step by step

sleepingly 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 ly

StepLanguageWordMeaning
1EnglishlyAbbreviation of light-year
2VietnameselyAlternative spelling of li
Every word from Proto-Indo-European slab-Every word from Proto-Germanic slēpanąEvery word from Proto-West Germanic slāpan