ἀφειδεῖν
From LSJ
Ἔργων πονηρῶν χεῖρ' ἐλευθέραν ἔχε → Mali facinoris liberam serva manum → Von schlechten Taten halte deine Hände frei
Greek > English (Woodhouse Verbs Reversed)
(see also ἀφειδέω): be lavish of, be prodigal of, be reckless of, be unsparing of
Lexicon Thucydideum
non parcere, to show no mercy, 2.43.5, 2.51.5.