Where does “somnolence” come from?

somnolence (Middle French) comes from Late Latin somnolentia, from Latin somnus, from Proto-Italic swepnos, from Proto-Indo-European swépnos, from Proto-Indo-European swopnos, from Proto-Indo-European swep- — to sleep.

Ancestry of “somnolence”, step by step

StepLanguageWordMeaning
1Late Latinsomnolentiasleepiness, drowsiness; vocative singular of...
2Latinsomnussleep; drowsiness, slumber sloth, idleness; death
3Proto-Italicswepnos—
4Proto-Indo-Europeanswépnossleep, slumber
5Proto-Indo-Europeanswopnosdream
6Proto-Indo-Europeanswep-to sleep

Words derived from “somnolence”

Every word from Proto-Indo-European swep- →Every word from Proto-Indo-European swopnos →Every word from Proto-Indo-European swépnos →