Where does “stimulō” come from?

stimulō (Latin) comes from Latin stimulus, from Proto-Indo-European stey- — to stick; compress; condense.

Ancestry of “stimulō”, step by step

Step	Language	Word	Meaning
1	Latin	stimulus	a goad, prick; a sting; stimulus, incentive
2	Proto-Indo-European	stey-	to stick; compress; condense

stimulō — Etymology, Origin & Word History | Etymology Explorer