myEtymology.com: Greek etymology of atheos

Etymology of the Greek word atheos (ἄθεος)

the Greek word atheos, ἄθεος (godless)

using the Greek prefix a-, ἀ- (an- not, without)

derived from the Greek word theos, θεός (a deity, especially the supreme Divinity; figuratively, a magistrate; by Hebraism, very)

derived from the Proto-Indo-European root *dhēs-

French atheisme, French athée, Latin atheus, Latin atheos