thy
Ὁ δ' ἀνεξέταστος βίος οὐ βιωτὸς ἀνθρώπῳ -> The unexamined life is not worth living
Plato, Apology of Socrates 38aEnglish > Greek (Woodhouse)
adj.
P. and V. σός, or use V. σέθεν; e. g., κασίγνητος σέθεν, thy brother (Eur., El. 840; very common in Eur.).
Do you realise your sad plight? V. αἰσθάνει κακῶν σέθεν; (Eur. Tro. 744).