εὐδιόριστος
From LSJ
ὁ μὴ δαρεὶς ἄνθρωπος οὐ παιδεύεται → spare the rod and spoil the child | οne who hasn't been flayed is not being taught | if the man was not beaten, he is not educated | the man, who was not paddled, is not educated
English (LSJ)
ον,
A easy to define, Arist. de An.421a7; easy to distinguish, Gal.7.778.