ἀληθινῶς
From LSJ
Ἄνθρωπος ὢν ἥμαρτον· οὐ θαυμαστέον → Being human I made a mistake; there is nothing remarkable about it.
French (Bailly abrégé)
adv.
véritablement, réellement.
Étymologie: ἀληθινός.
Russian (Dvoretsky)
ἀληθῐνῶς: истинно, действительно, подлинно Isocr., Plat., Polyb.