Etymograph

English

specious

Specious comes from Latin speciōsus ‘good-looking’, from speciēs ‘appearance’, and ultimately from Proto-Indo-European *speḱ- ‘to see, to look, to observe’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*speḱ-1‘to see, to look, to observe’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*spéḱyeti2‘to be looking at, to keep looking at’reconstructed
  3. Proto-Italicc. 1500–700 BCE*spekjō2‘to observe, see’reconstructed
  4. Latinc. 75 BCE–200 CEspeciō3‘to observe, watch, look at’
  5. Latinc. 75 BCE–200 CEspeciēs3‘appearance’
  6. Latinc. 75 BCE–200 CEspeciōsus4‘good-looking’
  7. Anglo-Normanc. 1066–1400specious4
  8. Middle Englishc. 1150–1500speciose4
  9. Englishearliest quotation 1649specious4

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Proto-Indo-European *spéḱyeti
  2. 2 Wiktionary, Latin specio
  3. 3 Wiktionary, Latin speciosus
  4. 4 Wiktionary, English specious
  5. Earliest quotation in Wiktionary’s entry: 1649, John Milton, London: […] Matthew Simmons: “now to the discourse itself, voluble enough, and full…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*speḱ-Wiktionary, Proto-Indo-European *spéḱyeti‘to see, to look, to observe’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*spéḱyetiWiktionary, Latin specio‘to be looking at, to keep looking at’reconstructed
  3. Proto-Italicc. 1500–700 BCE*spekjōWiktionary, Latin specio‘to observe, see’reconstructed
  4. Latinc. 75 BCE–200 CEspeciōWiktionary, Latin speciosus‘to observe, watch, look at’
  5. Latinc. 75 BCE–200 CEspeciēsWiktionary, Latin speciosus‘appearance’
  6. Latinc. 75 BCE–200 CEspeciōsusWiktionary, English specious‘good-looking’
  7. Anglo-Normanc. 1066–1400speciousWiktionary, English specious
  8. Middle Englishc. 1150–1500specioseWiktionary, English specious
  9. Englishearliest quotation 1649speciousWiktionary, English specious. Earliest quotation in Wiktionary’s entry: 1649, John Milton, London: […] Matthew Simmons: “now to the discourse itself, voluble enough, and full…”

Linked words

through Proto-Indo-European *speḱ- ‘to see, to look, to observe’

spy, microscope, suspicion, espionage, skeptic, kaleidoscope, gyroscope, espy, 117 more

through Proto-Indo-European *spéḱyeti ‘to be looking at, to keep looking at’

scope, skeptical, endoscopic, macroscopic, spectroscopic, 115 more

through Proto-Italic *spekjō ‘to observe, see’

speculation, speculative, speculate, inconspicuous, specular, 27 more

through Latin speciō ‘to observe, watch, look at’

despite, respect, perspective, spite, aspect, inspector, spectrum, spectacular, expectation, inspection, spectacle, retrospective, inspect, spectator, conspicuous, retrospect, expectant, specter, speculator, circumspect, 29 more

through Latin speciēs ‘appearance’

spice, especial, 7 more

Today it means

adj Seemingly well-reasoned, plausible or true, but actually fallacious.

Sources

Sources: Wiktionary, “specious”; the older steps come from the Wiktionary entries for Proto-Indo-European *spéḱyeti, Latin specio, Latin speciosus. 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 *speḱ- / specious

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