Where does “ciblar” come from?

ciblar (Old Occitan) comes from Latin sībilāre, from Latin sībilus, from Proto-Indo-European sweysd- — to hiss.

Ancestry of “ciblar”, step by step

Step	Language	Word	Meaning
1	Latin	sībilāre	—
2	Latin	sībilus	—
3	Proto-Indo-European	sweysd-	to hiss

ciblar — Etymology, Origin & Word History | Etymology Explorer