ἀποιστέον
From LSJ
ἐάν μή διδάξητε περί ἀρετὴς τούς τό ἀργύριον κλέψαντας, οὐ ταξόμεθα οἱ ὁπλῖται → if you don't teach those who have stolen money a lesson on moral virtue, we, the hoplites, will not line up
English (LSJ)
perferendum, Gloss.
Greek (Liddell-Scott)
ἀποιστέον: ῥηματ. ἐπίθ. τοῦ ἀποφέρω, πρέπει τις νὰ ἀποφέρῃ, ἀποκομίσῃ, ἀφαιρέσῃ, Γλωσσ.
Spanish (DGE)
perferendum, Gloss.2.237.