διαθεατέον
From LSJ
τὸ λακωνίζειν πολὺ μᾶλλόν ἐστιν φιλοσοφεῖν ἢ φιλογυμναστεῖν → to behave like a Lacedaemonian is much more to love wisdom than to love gymnastics (Plato, Protagoras 342e6)
English (LSJ)
one must examine, λογισμῷ Pl.R.611c.
Spanish (DGE)
hay que examinar con detenimiento οἷόν ἐστιν καθαρὸν γιγνόμενον, τοιοῦτον ... λογισμῷ δ. Pl.R.611c.
Dutch (Woordenboekgrieks.nl)
διαθεατέον, adj. verb. van διαθέαομαι het moet goed bekeken worden.