problem
From LSJ
Aristotle, Nicomachean Ethics, 5.30
English > Greek (Woodhouse)
substantive
difficulty: P. and V. ἀπορία, ἡ.
in geometry: P. πρόβλημα, τό.
leaving to others these subtle problems of philosophy: V. ἄλλοις τὰ κομψὰ ταῦτ' ἀφεὶς σοφίσματα (Euripides, Fragment).