experiment
From LSJ
μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea
English > Greek (Woodhouse)
subs.
P. and V. πεῖρα, ἡ. Make an experiment on: P. πεῖραν ποιεῖσθαι (gen.). You would never see them making new experiments: Ar. οὐχὶ μεταπειρωμένας ἴδοις ἂν αὐτάς (Eccles. 217.)