sed form finite verb form tensed-S-condition propositional island constraint tenuis vs media [Lat. tenuis ‘thin,’ medius ‘middle’]

Terms that, in the tradition of Greek and Latin grammarians, denote the difference between ‘thin’ p, t, k and ‘middle’ b, d, g. In Greek tenuis vs media are in opposition to the aspirates ph, th, kh. In Indo-European a distinction is drawn between the nonaspirated tenues p, t, k and the mediae b, d, g, on the one hand, and the aspirated mediae bh, dh, gh, on the other. In older literature, the tenues/mediae sounds are lumped together as mutes.