inhibitory

Etymology

It is borrowed from Medieval Latin inhibitōrius,^{[1][2][3][4][5]} formed from Latin inhibitus, the past participle of inhibeō (“to hold in, keep back”), and the suffix -ōrius.^[3][5][2] In Caxton it renders Middle French inhibitoire, recorded in the 15th century and now obsolete.^[1] The Latin verb is formed from in- (“in, on”) and habeō (“to hold”).^[2]

Earliest recorded meaning

Prohibitory, of the nature of a prohibition: 1490, in Caxton's translation of the Eneydos.^[1][4] Etymonline glosses its early use as holding back, curbing or restraining.^[2]

Semantic evolution

The word first belonged to law and church government, where an inhibitory order forbade an action: the Shorter Oxford quotes Lingard on an inhibitory papal brief forbidding judgment in Henry VIII's case against Catherine.^[4] The verb inhibit had meanwhile softened from "forbid" to "restrain, check" in the 1530s,^[2] and in the 19th century physiology and psychology took up the general sense: from 1870, in Herbert Spencer, inhibitory meant producing inhibition, as in the inhibitory nerve, whose stimulation represses or lessens an action.^[1] Merriam-Webster Unabridged illustrates the current sense with nervous action and with the action of fluorides.^[3]

Timeline

• 1490 – prohibitory, of the nature of a prohibition.^[1][4]
• 1870 – checking or restraining something; producing inhibition, as of a nerve.^[1]

Meanings

Adjective

1. Tending to inhibit, restrain or slow something down; producing inhibition: the inhibitory effect of the drug on the enzyme.^[3][1][4]
2. Of the nature of a prohibition; prohibitory.^[3][1][4]

Word family

• noninhibitory
• subinhibitory

Related words

• inhibit
• inhibition
• inhibitor

References

1. ^ a b c d e f g h i j Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
2. ^ a b c d e Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
3. ^ a b c d e Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
4. ^ a b c d e f Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
5. ^ a b Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.