Where does “yen sleep” come from?

yen sleep (English) comes 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.

yen sleep (English): a trance-like state resulting from the use of...

Definitions

  1. a trance-like state resulting from the use of...

Ancestry of “yen sleep”, step by step

yen sleep traces back through two separate lines of ancestry.

via English sleep

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

via English yen

StepLanguageWordMeaning
1EnglishyenThe unit of Japanese currency since 1871,...
2Japanesea round or circular object; a circle; roundness;...
3Chinesecircular, round; yuan, yen, dollar; round
Every word from Proto-Indo-European slab-Every word from Proto-Germanic slēpanąEvery word from Proto-West Germanic slāpan