διοριστέον
From LSJ
ἑτέρως ἠδύνατο βέλτιον ἢ ὡς νῦν ἔχει κατεσκευάσθαι → otherwise they could have been constructed better than they are now (Galen, On the use of parts of the body 4.143.1 Kühn)
English (LSJ)
A one must distinguish, Pl.Lg.874d, Arist.Ph.204a2, Longin.11.3, etc.
Greek (Liddell-Scott)
διοριστέον: ῥημ. ἐπίθ., πρέπει τις νὰ διακρίνῃ, Πλάτ. Νόμ. 874D, Ἀριστ., κτλ.
French (Bailly abrégé)
adj. verb. de διορίζω.