Etymologically
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inhibitor

This is the current revision of this entry, as edited by bogdan on 31 October 2026 at 21:00. This address is a permanent link to this version.
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Pronunciation

  • US: /ɪnˈhɪbɪtɚ/[1]

Etymology

It is formed from English inhibit + -or, as an agent noun in Latin form;[2][3][4][5] the OED compares Medieval Latin inhibitor and Italian inhibitore, recorded by Florio in 1611.[2] The form inhibiter is older, from the 1610s.[4][3] Inhibit is from Latin inhibitus, the past participle of inhibeō (“to hold in, hold back”), from in- (“in, on”) and habeō (“to hold”).[4]

Earliest recorded meaning

One who takes out an inhibition, in Scots law: 1868, in an Act of Parliament.[2][4] Merriam-Webster dates the word to about 1611.[6]

Semantic evolution

The first sense, a person who inhibits, was rare and mostly legal: in Scots law an inhibitor was the party who obtained an inhibition, a writ restraining a debtor from disposing of property.[2][3] The general sense, something that inhibits, appears in 1902, in William James's The Varieties of Religious Experience, which calls danger the great inhibitor of action for most men.[2][3] The scientific senses followed: in genetics, a gene that prevents another from being expressed (1911), and in chemistry and biochemistry a substance that slows or stops a reaction or lessens an enzyme's activity (1914).[2][4] Collins calls such a substance an anticatalyst and contrasts it with a catalyst.[7] Later compounds name drugs by what they inhibit, such as ACE inhibitor and protease inhibitor.[6]

Timeline

  • 1610s – the form inhibiter.[4]
  • c. 1611 – first known use, according to Merriam-Webster.[6]
  • 1868 – in Scots law, one who takes out an inhibition.[2][4]
  • 1902 – that which inhibits.[2]
  • 1911 – a gene that suppresses the effect of another gene.[2]
  • 1914 – a substance that slows or prevents a chemical reaction.[2][4]

Meanings

Noun

  1. A person or thing that inhibits: Fear of failure is a powerful inhibitor of creativity.[7][6][2]
  2. A substance that slows down or stops a chemical reaction; a negative catalyst.[7][6][2]
  3. (biochemistry) A substance that reduces the activity of an enzyme or blocks a metabolic or physiological process.[7][6][2]
  4. A substance added to reduce corrosion or rust, as in antifreeze.[6]
  5. (genetics) A gene that prevents the normal effect of another gene.[6][2]
  6. (Scots law, rare) A person who takes out an inhibition.[2][3]

Word family

  • vasoinhibitor
  • ACE inhibitor
  • protease inhibitor
  • proton pump inhibitor
  • selective serotonin reuptake inhibitor

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 o Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ 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
  4. ^ a b c d e f g h Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  6. ^ a b c d e f g h Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  7. ^ a b c d Collins English Dictionary (2023), Glasgow: HarperCollins