Where does “zuschwellen” come from?

zuschwellen (German) comes from German zu-, from Middle High German zuo-, from Old High German zuo-, from Proto-West Germanic *tō, from Proto-Germanic tō, from Proto-Indo-European de — Emphatic or contrastive particle, and, but;...

zuschwellen (German): to swell up to become swollen in a way that something becomes constricted, e.g. the throat

Definitions

to swell up to become swollen in a way that something becomes constricted, e.g. the throat

Ancestry of “zuschwellen”, step by step

Step	Language	Word	Meaning
1	German	zu-	Prefix meaning to, to-, at, on, by; Obsolete form...
2	Middle High German	zuo-	—
3	Old High German	zuo-	—
4	Proto-West Germanic	*tō	—
5	Proto-Germanic	tō	to
6	Proto-Indo-European	de	Emphatic or contrastive particle, and, but;...

Every word from Proto-Indo-European de →Every word from Proto-Germanic tō →Every word from Proto-West Germanic *tō →