Where does “swelle” come from?

swelle (Middle High German) comes from Old High German swelli, from Proto-Germanic sulī, from Proto-Indo-European sēl- — to calm, quiet, be favourable.

Ancestry of “swelle”, step by step

Step	Language	Word	Meaning
1	Old High German	swelli	—
2	Proto-Germanic	sulī	balk, bar, threshold, sill
3	Proto-Indo-European	sēl-	to calm, quiet, be favourable

Words derived from “swelle”

subliminal
subliminally
Schwellenangst
subliminal
subliminalement
Schwellenpflug
Geruchsschwellenwert
Schwellenwert
Schwellenangst
unterschwellig
Schwelle
Schwellenland

Every word from Proto-Indo-European sēl- →

swelle — Etymology, Origin & Word History | Etymology Explorer