Etymology of the French word concile
the Old French word concile
derived from the Latin word concilium (association, society, company; public gathering, meeting; popular assembly; sexual union, coition; close conjunction)
using the Latin prefix con- (together)
derived from the Latin word calare (to call, inserted or placed between; announce, proclaim; summon; let down, allow to hang free; loosen)
derived from the Greek word chalao, χαλάω (to lower (as into a void))
derived from the Greek word kaleo, καλέω (to 'call' (properly, aloud, but used in a variety of applications, directly or otherwise))
derived from the Greek word chalan
derived from the Proto-Indo-European root *kelə- (to call)