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Etymology and origin of the English word -or

English has two suffixes spelled -or, for a condition and for an agent, both ultimately from Latin but separate there; dictionaries number them differently.[1][2][3]

Pronunciation

-or1 condition

Confidence
Established
Formation
Borrowing
Borrowed from
Anglo-Norman -our via Middle English
Ultimate origin
Latin -or

Etymology

The suffix of condition is inherited from Middle English -our, also -or,[5][2][6] borrowed from Anglo-Norman -our and Old French -or, also -ur (later -eur),[1][7][3] from Latin -or, in Old Latin -ōs,[1][6][8] from the same Indo-European base as Ancient Greek -ως (-ōs).[1][6]

Earliest recorded meaning

In Latin the nouns were mostly linked to intransitive verbs in -ēre, as pallor was.[6] The earliest English borrowings were spelled with o or u, as onor, onur, but after 1300 usually with Anglo-Norman ou, as onour.[1]

Semantic evolution

In early modern English many -our words were respelled after Latin.[1] The spelling -or is found now and then in Middle English in error, horror, liquor and pallor, grew commoner in the 16th century and generally won by the end of the 18th.[1] In others, such as ardour, honour and labour, both spellings varied freely;[1] British usage then kept -our while American usage has -or.[1][5] Later arrivals such as squalor and torpor rarely had -our.[1] The suffix itself is not productive in English.[1]

Timeline

  • after 1300 – -our is the regular spelling.[1]
  • 16th century – -or grows more common.[1]
  • late 18th century – -or generally prevails in words such as error and horror.[1]

Meanings

Suffix

  1. Forming nouns for a state, condition or quality, in words from Latin and French: terror, tremor.[9][7][1]
  2. The American spelling of -our: color.[9][7]

Word family

-or2 agent

Confidence
Established
Formation
Borrowing
Borrowed from
Anglo-Norman -our via Middle English
Ultimate origin
Latin -tor

Etymology

The agent suffix is inherited from Middle English -our, also -or,[3][2] borrowed from Anglo-Norman -our and Old French -or, and directly borrowed from Latin -tor,[1][2][3][6] from the same Indo-European base as Ancient Greek -τωρ (-tōr).[1] The French forms -eor and -eur are partly from -ātor, -ītor and similar endings, reduced in living use.[1][3][2]

Earliest recorded meaning

In Middle English the words spelled -our were of two kinds: Latin agent nouns such as confessor, doctor and pastor, and those that had lost a vowel in Old French, such as conqueror, emperor and governor.[1]

Semantic evolution

A third group was borrowed later from Latin or adopted from French and kept the t, as in creator, senator and translator; older ones among them had -our before the Latin spelling won out.[1] The suffix has been productive from the 16th century on, especially with verbs in -ate or on Latin stems.[1][2] Its frequent use in legal terms beside -ee (lessor, lessee) gave it a technical or professional air.[1][6][7] That explains the difference between sailor, who sails for a living, and sailer.[1] Middle English tended to confuse -er and -our, and since the 15th century many -our words have gone over to -er (barber, preacher, robber).[1]

Timeline

  • 15th century on – many agent nouns exchange -our for -er.[1]
  • 16th century – opiniator.[1]
  • 17th century – obstructor.[1]
  • 18th century – oscillator.[1]
  • 19th century – originator.[1]
  • 20th century – nucleator.[1]

Meanings

Suffix

  1. Forming nouns for a person or thing that does what the verb says: inventor, elevator, generator.[3][9][2]
  2. Forming legal terms for the person acting, as opposed to one in -ee: guarantor.[7][6]

Word family

Usage notes

Noah Webster made -or nearly universal in the United States, according to Etymonline, which adds that Shakespeare's first three folios used both spellings and that only the Fourth Folio of 1685 settles on -our.[5] The ending of manor and mirror instead continues French -oir, and that of major and minor is a comparative suffix.[1]

References

  1. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z 27 28 29 30 31 Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  2. ^ a b c d e f g Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
  3. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  4. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  5. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  6. ^ a b c d e f g Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
  7. ^ a b c d e Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  8. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
  9. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins

Related etymologies

Cite this entry

“-or.” Etymologically, 6 Nov. 2026, etymologically.com/en/-or. Accessed 6 Nov. 2026.

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