Where does “сонливость” come from?

сонливость (Russian) comes from Russian сонли́вый, from Russian сон, from Proto-Slavic sъ̀nъ, from Proto-Balto-Slavic supnas, from Proto-Indo-European supnós, from Proto-Indo-European swóp-r̥ ~ swép-n̥s, from Proto-Indo-European swep- — to sleep.

сонливость (Russian): sleepiness

Definitions

  1. sleepiness

Ancestry of “сонливость”, step by step

StepLanguageWordMeaning
1Russianсонли́выйsleepy
2Russianсонsleep; dream
3Proto-Slavicsъ̀nъsleep, dream
4Proto-Balto-Slavicsupnassleep, dream
5Proto-Indo-Europeansupnóssleep; death
6Proto-Indo-Europeanswóp-r̥ ~ swép-n̥s—
7Proto-Indo-Europeanswep-to sleep
Every word from Proto-Indo-European swep- →Every word from Proto-Indo-European swóp-r̥ ~ swép-n̥s →Every word from Proto-Indo-European supnós →