Where does “siccātus” come from?

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

Ancestry of “siccātus”, step by step

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

siccātus — Etymology, Origin & Word History | Etymology Explorer