Where does “expono” come from?

expono (Latin) comes from Latin pōnō, from Proto-Italic poznō, from Proto-Italic pozinō, from Proto-Italic sinō.

Ancestry of “expono”, step by step

Step	Language	Word	Meaning
1	Latin	pōnō	—
2	Proto-Italic	poznō	—
3	Proto-Italic	pozinō	—
4	Proto-Italic	sinō	—

expono — Etymology, Origin & Word History | Etymology Explorer