An Etymological Dictionary of Astronomy and Astrophysics

An assembly of persons summoned or convened for consultation, deliberation, or advice (Dictionary.com).

Etymology (EN): From M.E. counseil, conseil, from Anglo-Norman cuncile, from O.Fr. concile “assembly; council meeting,” from L. concilium “a meeting, a gathering of people,” from → com- “together” + calere “to call, announce” + -ium.

Etymology (PE): Hâšin, literally “sitting together” (on the model of Skt. samsad- “sitting together, assembly”), from prefix hâ-, variant of ham- “together,” → com-, + (ne)šin, present stem of nešastan “to sit;” Mid.Pers. nišin-, nišastan “to sit;” O.Pers. (ni)šâd- “to establish;” Av. hiδ- “to sit;” cf. Skt. sad- “to sit,” sidati “sits;” Gk. ezesthai “to sit,” L. sedere “to sit;” Goth. sitan, Ger. sitzen, E. (to) sit; PIE root *sed- “to sit.”