Etymograph

English

nautilus

Nautilus comes from Latin nautilus ‘paper nautilus, argonaut’, from Ancient Greek ναύτης ‘seaman’, and ultimately from Proto-Indo-European *néh₂us ‘boat’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*néh₂us1‘boat’reconstructed
  2. Proto-Hellenicc. 2200–1600 BCE*nā́us1reconstructed
  3. Ancient Greekc. 800–300 BCEναῦς2‘ship’
  4. Ancient Greekc. 800–300 BCEναύτης3naútēs‘seaman’
  5. Ancient Greekc. 800–300 BCEναυτίλος4nautílos‘paper nautilus, sailor’
  6. Latinc. 75 BCE–200 CEnautilus4‘paper nautilus, argonaut’
  7. Englishearliest quotation 1956nautilus4

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Ancient Greek ναῦς
  2. 2 Wiktionary, Ancient Greek ναύτης
  3. 3 Wiktionary, Ancient Greek ναυτίλος
  4. 4 Wiktionary, English nautilus
  5. Earliest quotation in Wiktionary’s entry: 1956, Arthur C. Clarke, The City and the Stars: “He was still prepared to go on collecting all…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*néh₂usWiktionary, Ancient Greek ναῦς‘boat’reconstructed
  2. Proto-Hellenicc. 2200–1600 BCE*nā́usWiktionary, Ancient Greek ναῦςreconstructed
  3. Ancient Greekc. 800–300 BCEναῦςWiktionary, Ancient Greek ναύτης‘ship’
  4. Ancient Greekc. 800–300 BCEναύτηςWiktionary, Ancient Greek ναυτίλοςnaútēs‘seaman’
  5. Ancient Greekc. 800–300 BCEναυτίλοςWiktionary, English nautilusnautílos‘paper nautilus, sailor’
  6. Latinc. 75 BCE–200 CEnautilusWiktionary, English nautilus‘paper nautilus, argonaut’
  7. Englishearliest quotation 1956nautilusWiktionary, English nautilus. Earliest quotation in Wiktionary’s entry: 1956, Arthur C. Clarke, The City and the Stars: “He was still prepared to go on collecting all…”

Linked words

through Proto-Indo-European *néh₂us ‘boat’

navy, naval, navigation, navigate, navigator, navigable, nao, nef, nau, nacelle, navicular, 10 more

through Ancient Greek ναῦς ‘ship’

noise, nausea, 4 more

through Ancient Greek ναύτης ‘seaman’

aeronautics, astronautics, 3 more

Today it means

noun A marine mollusc, of the family Nautilidae native to the Pacific Ocean and Indian Ocean, which has tentacles and a spiral shell with a series of air-filled chambers, of which Nautilus is the type genus.

Sources

Sources: Wiktionary, “nautilus”; the older steps come from the Wiktionary entries for Ancient Greek ναῦς, Ancient Greek ναύτης, Ancient Greek ναυτίλος. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *néh₂us / nautilus

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