conjecturally
From LSJ
κακοὶ μάρτυρες ἀνθρώποισιν ὀφθαλμοὶ καὶ ὦτα βαρβάρους ψυχὰς ἐχόντων → eyes and ears are poor witnesses for men if their souls do not understand the language (Heraclitus Phil.: Fr. B 107; Testimonia: Fragment 16, line 6)
English > Greek (Woodhouse)
adverb
as far as one can guess: V. ὡς εἰκάσαι, ὡς ἐπεικάσαι, ὡς ἀπεικάσαι.