Etymologically

Etymology and origin of the English word skeptic

From
Ancient Greek σκεπτικός
Ultimate origins
Proto-Indo-European *speḱ-Ancient Greek -ικός
Etymology tree
inherited borrowed derived
Ancient Greek σκέπτομαι (sképtomai)
Ancient Greek σκεπτικός (skeptikós)
Latin scepticus
English skeptic
Derivations
From the same root
Ancient Greek σκοπός (skopós) ← σκέπτομαι

Pronunciation

  • /ˈskɛp.tɪk/[1]

Forms

Etymology

It comes, partly through Middle French sceptique,[2][3] from Latin scepticus,[4][2][3][5][6] from Ancient Greek σκεπτικός (skeptikós, “inquiring, reflective”),[4][2][3][5][6] from sképtesthai “to look, consider, examine”.[4][2][3][5][6] The followers of the Greek philosopher Pyrrho took the name Skeptikoí for themselves.[2][3] The spelling with sk-, after the Greek, dates from the early 17th century and became standard in the U.S.[2][3]

Earliest recorded meaning

A member of an ancient Greek school that doubted the possibility of real knowledge (1587).[2][3][5]

Semantic evolution

The extended sense, a person with a doubting attitude who suspends judgment, is recorded by 1615.[2][3] By the 1630s the word also meant one who doubts the truth of Christianity without denying it outright.[3] Skeptical is from 1639 and skepticism from 1646.[2]

Timeline

  • 1587 – a member of the ancient Skeptics.[2][5]
  • 1615 – one who has a doubting attitude.[2][3]
  • before 1631 – spelling skeptic.[2]
  • 1630s – a religious doubter.[3]
  • 1639 – skeptical.[2]
  • 1646 – skepticism.[2]

Modern meaning

Noun

  1. A person who habitually doubts or questions accepted beliefs or claims.
  2. A person inclined to skepticism in religious matters.
  3. An adherent of philosophical skepticism, especially of the ancient Greek school of Pyrrho.

Adjective

  1. Skeptical.

Usage notes

Random House lists doubter as a synonym and believer as an antonym, and refers to its discussion at atheist.[6]

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n Barnhart, Robert K., ed. (1995), The Barnhart Concise Dictionary of Etymology, New York: HarperCollins
  3. ^ a b c d e f g h i j k Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b c The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
  5. ^ a b c d e Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
  6. ^ a b c d Random House Webster's Unabridged Dictionary (1999), 2nd ed., New York: Random House

Related etymologies

Cite this entry

“Skeptic.” Etymologically, 6 Nov. 2026, etymologically.com/en/skeptic. Accessed 15 Nov. 2026.

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