Where does “заспать” come from?

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

заспать (Russian): to forget something after sleeping

Definitions

  1. to forget something after sleeping

Ancestry of “заспать”, 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 →