ἄθεος (Ancient Greek)

Where does "ἄθεος" come from?

The Ancient Greek word 'ἄθεος' is a compound formation combining the negative prefix 'ἀ-' meaning 'without' and 'θεός' meaning 'god'. The root noun 'θεός' traces back through Proto-Hellenic '*tʰehós' to the Proto-Indo-European form '*dʰéh₁s', which relates to the root '*dʰeh₁-' meaning 'to do' or 'to place'. Over time, 'ἄθεος' evolved from the literal sense of 'without gods' or 'abandoned by the gods' into a term used to describe those who rejected or disdained the official gods, eventually leading to the modern understanding of 'atheist'. It is distinct from the Latin 'deus', which shares a closer etymological connection with the Greek 'Ζεύς'.

Full etymology tree

• ἄθεος (átheos) (Ancient Greek), 'without gods'
  • compound ἀ- (a-) (Ancient Greek), 'The alpha privativum, used to make words that have a sense opposite to the word (or stem) to which the prefix is attached. It is also known as privative a and alpha privative; a-, ab-, an-, anti-, contra-, de-, dis-, ex-, il-, im-, in-, ob-, ne-, non-, not, un-'
  • compound θεός (theós) (Ancient Greek), 'divine (used only in comparative: θεώτερος (theṓteros))'
    • inherited *tʰehós (Proto-Hellenic), 'god, deity'
      • derived *dʰéh₁s (Proto-Indo-European), 'god, godhead, deity'
        • derived *dʰeh₁- (Proto-Indo-European), 'to do'
        • suffix *-s (Proto-Indo-European), 'Derives feminine mobile-accented root nouns from roots.'

Ancestors

• ἀ- (Ancient Greek)
• θεός (Ancient Greek)

Descendants and derived words

• άθεος (Greek)
• atheos (Latin)

Updated August 2026

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Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris