fraternally
From LSJ
Τούτῳ τῷ λόγῳ χρήσαιτο ἄν τις ἐπ' ἐκείνων τῶν ἀνθρώπων οἳ παραδόξως ἀλαζονεύονται, μηδὲ τὰ κοινὰ τοῖς ἀνθρώποις ἐπιτελεῖν δυνάμενοι → One would use this fable for those who give themselves unreasonable airs, but can't handle everyday life (Aesop 40)
Translations
Catalan: fraternalment; Czech: bratrsky; Greek: αδελφικά, αδελφικώς; Ancient Greek: ἀδελφικῶς; French: fraternellement; Georgian: ძმურად; Italian: fraternamente; Polish: bratersko; Spanish: fraternalmente, irmãmente