agnostic (English)

Where does "agnostic" come from?

The word 'agnostic' was coined by biologist Thomas Henry Huxley in 1870, drawing on Ancient Greek roots to describe a position of intellectual uncertainty. It combines the privative prefix 'a-' (not) with the root related to 'gnosis' (knowledge), both of which trace back to the ancient Proto-Indo-European *ǵneh₃- ('to know') and *n̥- ('not'). Consequently, the term literally signifies one who does not claim to possess absolute knowledge about the unknowable.

Full etymology tree

• agnostic (English), 'Doubtful or uncertain about the existence or demonstrability of God or other deity.'
  • inherited ἄγνωστος (ágnōstos) (Ancient Greek), 'unknown, unheard of, forgotten'
    • affix 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-'
      • inherited *ə- (Proto-Hellenic), 'un-, not'
        • inherited *n̥- (Proto-Indo-European), 'not, un-'
          • derived *né (Proto-Indo-European), 'not'
    • affix γιγνώσκω (gignōskō) (Ancient Greek), 'to be aware of; to perceive, observe, know, learn'
      • inherited *gignṓskō (Proto-Hellenic)
        • inherited *ǵiǵneh₃-sḱéti (Proto-Indo-European)
          • derived *ǵneh₃- (Proto-Indo-European), 'to recognise, to know'

Direct ancestors

• ǵneh₃- (Proto-Indo-European)
• ἄγνωστος (Ancient Greek)
• Gnostic (English)
• ἀ- (Ancient Greek)

Updated June 2026

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