Where does “sechié” come from?

sechié (Old French) comes from Latin siccātus, from Latin siccō, from Latin siccus, from Proto-Celtic siskʷos, from Proto-Indo-European sisku-.

Ancestry of “sechié”, step by step

Step	Language	Word	Meaning
1	Latin	siccātus	—
2	Latin	siccō	—
3	Latin	siccus	dry; sober; thirsty
4	Proto-Celtic	siskʷos	dry
5	Proto-Indo-European	sisku-	—

sechié — Etymology, Origin & Word History | Etymology Explorer