αἴτιος
Etym. αἰτέω
I. "to blame, blameworthy, culpable", Il., etc.: comp., αἰτιώτερος "more culpable", Thuc.; Sup., τοὺς αἰτιωτάτους "the most guilty", Hdt.; τινος "for" a thing, id=Hdt.
2. as Subst., αἴτιος, ὁ, "the accused, culprit", Lat. reus, Aesch., etc.; οἱ αἴτιοι τοῦ πατρός "they who have sinned against" my father, id=Aesch.:—c. gen. rei, οἱ αἴτ. τοῦ φόνου "those guilty" of murder, id=Aesch.
II. "being the cause, responsible for", c. gen. rei, Hdt., etc.; c. inf., Soph.: Sup., αἰτιώτατος ναυμαχῆσαι "mainly instrumental in causing" the seafight, Thuc.
2. αἴτιον, τό, "a cause", Plat., etc.