insect (English)

Where does "insect" come from?

The word 'insect' traces its origins to the Latin 'īnsectum,' which itself was a direct translation of the Ancient Greek term 'éntomon.' Both terms literally mean 'cut into,' reflecting the observation that an insect’s body appears segmented into distinct sections. This concept stems from a root meaning 'to cut,' highlighting how ancient observers focused on the notched appearance of these creatures to name them.

Full etymology tree

• insect (English), 'An arthropod (in the Insecta class) characterized by six legs, up to four wings, and a chitinous exoskeleton.'
  • inherited insecte (Middle French)
    • inherited īnsectum (Latin), 'inflection of īnsectus:'
      • calque ἔντομον (éntomon) (Ancient Greek), 'insect'
        • contraction ζῷον (zōîon) (Ancient Greek), 'animal, beast'
          • derived ζώς (zṓs) (Ancient Greek)
          • suffix -ῐον (-ĭon) (Ancient Greek), 'Termination of neuter substantivations of adjectives in -ιος (-ios, “belonging to”, also forms parasynthetic compounds).'
        • derived ἔντομος (éntomos) (Ancient Greek), 'cut in pieces, cut up'
          • affix ἐν- (en-) (Ancient Greek), 'in-'
          • derived τόμος (tómos) (Ancient Greek), 'slice, piece'
      • derived īnsectus (Latin), 'cut up or into, having been cut up or into; incised, dissected'
        • affix īn- (Latin), 'un-, non-, not'
        • derived secō (Latin), 'to cut, cut off'
          • inherited *sekaō (Proto-Italic), 'to cut'
            • inherited *sek- (Proto-Indo-European), 'to cut, cut off, sever'

Direct ancestors

• sek- (Proto-Indo-European)
• insectum (Latin)
• ἔντομον (Ancient Greek)

Updated July 2026

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