Etymograph

English

skeptical

Skeptical comes from Latin scepticus ‘a skeptic, a member of the sect of skeptics’, from Ancient Greek σκέπτομαι ‘to look at, examine’, and ultimately from Proto-Indo-European *speḱ-.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*speḱ-1‘to see, to look, to observe’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*spéḱyeti1‘to be looking at, to keep looking at’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*sképt͏̌omai1‘to look at’reconstructed
  4. Ancient Greekc. 800–300 BCEσκέπτομαι1sképtomai‘to look at, examine’
  5. Ancient Greekc. 800–300 BCEσκεπτικός1skeptikós‘a sceptic, a member of the school of thought founded by Pyrrho of Elis’
  6. Latinc. 75 BCE–200 CEscepticus1‘a skeptic, a member of the sect of skeptics’
  7. Englishearliest quotation 2009skeptical1

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, English skeptical
  2. Earliest quotation in Wiktionary’s entry: 2009, Xolani1990, Brown Lotto trick 'confuses' fans: “I can see why people are so skeptical [sic]…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*speḱ-Wiktionary, English skeptical‘to see, to look, to observe’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*spéḱyetiWiktionary, English skeptical‘to be looking at, to keep looking at’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*sképt͏̌omaiWiktionary, English skeptical‘to look at’reconstructed
  4. Ancient Greekc. 800–300 BCEσκέπτομαιWiktionary, English skepticalsképtomai‘to look at, examine’
  5. Ancient Greekc. 800–300 BCEσκεπτικόςWiktionary, English skepticalskeptikós‘a sceptic, a member of the school of thought founded by Pyrrho of Elis’
  6. Latinc. 75 BCE–200 CEscepticusWiktionary, English skeptical‘a skeptic, a member of the sect of skeptics’
  7. Englishearliest quotation 2009skepticalWiktionary, English skeptical. Earliest quotation in Wiktionary’s entry: 2009, Xolani1990, Brown Lotto trick 'confuses' fans: “I can see why people are so skeptical [sic]…”

The story

From Latin scepticus + -al; attested earlier than skeptic.

Full etymology on Wiktionary

Linked words

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

spy, suspicion, espionage, inconspicuous, especial, espy, 113 more

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

special, respect, despite, specific, species, perspective, aspect, spectrum, inspector, spectacular, spite, inspection, expectation, speculation, specify, spice, specimen, inspect, spectacle, spectator, speculate, speculative, retrospective, retrospect, conspicuous, specter, expectant, circumspect, specious, speculator, specular, 109 more

through Proto-Hellenic *sképt͏̌omai ‘to look at’

microscope, kaleidoscope, gyroscope, 85 more

through Ancient Greek σκέπτομαι ‘to look at, examine’

scope, episcopal, spectroscopic, macroscopic, endoscopic, bishopric, 94 more

Today it means

adj Having, or expressing doubt; questioning.

Sources

Sources: Wiktionary, “skeptical”. 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- / skeptical

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