ὑπελθετέον
From LSJ
ἀλλ᾽ ἀμφὶ τοῖς σφαλεῖσι μὴ 'ξ ἑκουσίας ὀργὴ πέπειρα → to those who err in judgment, not in will, anger is gentle | men's wrath is softened toward those who have erred unwittingly
English (LSJ)
(ὑπέρχομαι) one must take shelter under, ὑπὸ τὰς στοάς Str.13.3.6.
Greek (Liddell-Scott)
ὑπελθετέον: ῥημ. ἐπίθ. τοῦ ὑπέρχομαι, δεῖ ὑπελθεῖν, ἴδε ἐλθετέον.
Russian (Dvoretsky)
ὑπελθετέον: adj. verb. к ὑπέρχομαι.