οἴεσθαι

From LSJ

περί τοῦ πέρδεσθαι οὐ καταισχύνει, πάντων γὰρ περδομένων → as for the farting, he causes no shame, because everybody farts

Source

Greek > English (Woodhouse Verbs Reversed)

(see also οἴομαι): believe, think, maintain an opinion