συνόμνυμι
συνόμνυμι
or -ύω
fut. -ομόσω
to swear together, Xen., Plut.
to promise by oath, τί τινι Soph.; ξυνώμοσαν θάνατον πατρί joined in swearing death against him, Aesch.
to join in a league or confederacy, Aesch., Thuc.
to form a confederacy with others, c. dat., Thuc.: in bad sense, to conspire, Hdt., Ar., etc.