syndic n.

word-forming element meaning "together with, jointly; alike; at the same time," also sometimes completive or intensive, from Greek syn (prep.) "with, together with, along with, in the company of," from PIE *ksun- "with" (source also of Russian so- "with, together," from Old Russian su(n)-). Assimilated to -l-, reduced to sy- before -s- and -z-, and altered to sym- before -b-, -m- and -p-. Since 1970s also with a sense of "synthetic."

wife of Orpheus in Greek mythology, from Latinized form of Greek Eurydike, literally "wide justice," from eurys "wide" (see eury-) + dike "custom, usage; justice, right; court case," "custom, usage," and, via the notion of "right as dependent on custom," "law, a right; a judgment; a lawsuit, court case, trial; penalty awarded by a judge," from PIE *dika-, from root *deik- "to show," also "pronounce solemnly."