merciless
From LSJ
μή, φίλα ψυχά, βίον ἀθάνατον σπεῦδε, τὰν δ' ἔμπρακτον ἄντλει μαχανάν → Oh! my soul do not aspire to eternal life, but exhaust the limits of the possible. | Do not yearn, O my soul, for immortal life! Use to the utmost the skill that is yours. | Do not, my soul, strive for the life of the immortals, but exhaust the practical means at your disposal.
English > Greek (Woodhouse)
adj . P. and V. σχέτλιος, σκληρός, πικρός, P. ἀπαραίτητος, V. νηλής, δυσπαραίτητος, ἀνοικτίρμων (Sophocles, Fragment), δυσάλγητος, Ar. and V. ἄτεγκτος, ἄνοικτος; see cruel.