Where does “sprung” come from?

sprung (Old High German) comes from Proto-Germanic springaną, from Proto-Indo-European spr̥ǵʰ.

Ancestry of “sprung”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	springaną	to spring, to jump up; to burst, to explode
2	Proto-Indo-European	spr̥ǵʰ	—

sprung — Etymology, Origin & Word History | Etymology Explorer