Where does “ciall” come from?

ciall (Irish) comes from Old Irish cíall, from Celtic *kʷeislā.

ciall (Irish): sense; sanity; normal state of mind

Definitions

Step	Language	Word	Meaning
1	Old Irish	cíall	sense, intelligence, mind; wisdom, good sense,...
2	Celtic	*kʷeislā	—

ciall — Etymology, Origin & Word History | Etymology Explorer