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subduction

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Etymology and origin of the English word subduction

Confidence
Established
Formation
Borrowing
First attested
1425 before 1425, a translation of Guy de Chauliac's Grande Chirurgie More words from the 15th century
Borrowed from
Latin subductio via Middle English
Ultimate origin
Latin dūcō

Pronunciation

  • UK: /səbˈdʌkʃən/[1]

Etymology

It is inherited from Middle English subduccioun,[2][3] borrowed from Latin subductiō,[4][2][3][5][6] which meant the hauling of a ship onto the beach, or a calculation, and in later Latin also removal (about 400) and the expulsion of something from the body (about 1200, in a British source).[4] The Latin noun is formed from the past participle stem of subdūcō (“to draw up, withdraw, take away”),[4][3][7] from sub- (“under”) and dūcō (“to lead”),[7][3] from Proto-Indo-European *deuk- (“to lead”).[7][3] In geology it follows French subduction, used by A. Amstutz in 1951.[4][3][8][7]

Earliest recorded meaning

The removal of harmful matter, especially excrement, from the body: before 1425, in a translation of Guy de Chauliac's Grande Chirurgie.[4][2] Etymonline glosses the early sense as "withdrawal, removal".[3]

Semantic evolution

In the 16th and 17th centuries the word took on the senses of its Latin source: subtraction or deduction (1555), and the taking away or withdrawal of something (before 1620).[4] Johnson (1755) gave "the act of taking away" and arithmetical subtraction.[9] From 1670 it was also used as a noun for the act of subduing, or the fact of being subdued.[4][3] Most of these senses are now rare.[4][6] The word gained a new life in 1970, when geologists took it from French for one plate of the earth's crust sinking beneath another, a process of plate tectonics.[4][3][5]

Timeline

  • before 1425 – the removal of harmful matter from the body (obsolete by 1676).[4][2]
  • 1555 – subtraction, deduction.[4]
  • before 1620 – taking away, withdrawal.[4][5]
  • 1670 – the act of subduing; subjection.[4][3]
  • 1970 – geology, the sinking of one crustal plate beneath another.[4][3]

Meanings

Noun

  1. (geology) The process by which the edge of one tectonic plate is forced down beneath another into the mantle: Subduction along the coast has raised a chain of volcanoes.[10][5][4]
  2. (rare) The taking away of something; withdrawal.[5][4][6]
  3. (rare) Subtraction or deduction.[5][4][6]
  4. The act of subduing, or the state of being subdued.[5][4][6]
  5. (obsolete, 1425–1676) The removal of harmful matter from the body.[4][2]

Word family

  • subduct

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e Kurath, Hans; Kuhn, Sherman M.; Lewis, Robert E., eds. (1952–2001), Middle English Dictionary, Ann Arbor: University of Michigan Press; online edition ed. Frances McSparran et al. (2000–2018)
  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 d e f g h i j k l m n o p q r s Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  5. ^ a b c d e f g Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  6. ^ 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
  7. ^ a b c d The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
  8. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
  9. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
  10. ^ Collins English Dictionary (2023), Glasgow: HarperCollins

Related etymologies

Cite this entry

“Subduction.” Etymologically, 13 Nov. 2026, etymologically.com/en/subduction. Accessed 13 Nov. 2026.

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