Where does “заснуть” come from?

заснуть (Russian) comes from Russian спать, from Old Church Slavonic съпати, from Proto-Slavic sъpati, from Proto-Indo-European swep- — to sleep.

заснуть (Russian): to fall asleep

Definitions

  1. to fall asleep

Ancestry of “заснуть”, step by step

StepLanguageWordMeaning
1Russianспатьto sleep; to have sex
2Old Church Slavonicсъпатиsleep
3Proto-Slavicsъpatito sleep
4Proto-Indo-Europeanswep-to sleep
Every word from Proto-Indo-European swep- →Every word from Proto-Slavic sъpati →Every word from Old Church Slavonic съпати →
заснуть — Etymology, Origin & Word History | Etymology Explorer