preventive

Etymology

It is formed from English prevent + -ive,^[2][3][4][5] or from Latin praevent-, the past participial stem of praeveniō (“to come or go before, anticipate”), with the same suffix.^[2][6] The Latin verb is formed from prae (“before”) and veniō (“to come”);^[6] in Late Latin it also meant "to prevent".^[6] The OED compares Spanish preventivo (once in 1422–5, then from 1731) and Italian preventivo (1601), as well as the earlier English preventing and the later preventative.^[2]

Earliest recorded meaning

That prevents or guards against something; precautionary: before 1626, in Francis Bacon's Considerations Touching a War with Spain (printed 1629).^[2][3] Johnson quoted Bacon's sentence "Wars preventive upon just fears are true defensives".^[7] Etymonline dates the adjective to the 1630s.^[6]

Semantic evolution

The word followed the modern sense of prevent, "to stop from happening", rather than its older one, "to come before": the sense "antecedent, anticipatory", used by Milton in 1642, lasted only until 1698.^[2][4] The medical sense, protecting against disease, appears in 1646 in Sir Thomas Browne's Pseudodoxia Epidemica.^[2] As a noun, a preventive measure or means of prevention, it is recorded before 1639 in a letter of Henry Wotton,^[2][3] and as a drug or treatment against disease from 1666, or the 1670s in Etymonline.^[2][6] Johnson (1755) gave the senses "tending to hinder" and "preservative; hindering ill", noting that physic is either curative or preventive.^[7] From 1708 the adjective described the coastguard officers whose work was to prevent smuggling, now mostly a historical use,^[2] and in the dialects of Scotland, Essex, Kent, Somerset and Cornwall a preventive was a coastguard.^[8] The noun also meant a contraceptive from 1822, in Francis Place's book on population.^[2] A nautical use, for a rope serving as a preventer, is recorded from 1831 to 1872.^[2]

Timeline

• before 1626 – that prevents or guards against something (Bacon).^[2][3]
• before 1639 – noun, a preventive measure.^[2][3]
• 1642 – antecedent, anticipatory (Milton; obsolete by 1698).^[2]
• 1646 – in medicine, protecting against disease.^[2]
• 1666 – noun, a medicine or treatment that prevents disease.^[2]
• 1708 – of the coastguard, concerned with preventing smuggling.^[2]
• 1822 – noun, a contraceptive.^[2]

Meanings

Adjective

1. Intended or serving to stop something from happening; precautionary: The council took preventive action against flooding.^[9][3][2]
2. In medicine, protecting against disease; prophylactic; also, of the branch of medicine concerned with preventing disease, as in preventive medicine.^[9][2]
3. Of a war or attack, started in order to forestall hostile action by an enemy.^[3][7]
4. (chiefly historical) In Britain, belonging to the customs service or the coastguard, whose work was to prevent smuggling.^[9][2]
5. (obsolete, 1642–1698) Coming before; antecedent, anticipatory.^[2][4]

Noun

1. Something that prevents or hinders; a precaution.^[3][2]
2. A drug, food or treatment taken to prevent disease.^[3][2]
3. A contraceptive.^[2]

Word family

• preventively
• preventiveness
• nonpreventive
• unpreventive
• preventive medicine
• preventive war

Related words

• prevent
• prevention
• preventative
• preventer
• prevene

Usage notes

The longer form preventative, formed from prevent and -ative, is recorded from 1655;^[3] Etymonline calls it an irregular formation and preventive the more correct one,^[6] and the OED notes that some usage guides recommend preventive instead.^[2]

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 p q r s t u v w x y z Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f g h i j Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
4. ^ a b c Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
5. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
6. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
7. ^ a b c Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
8. ^ Wright, Joseph, ed. (1898–1905), The English Dialect Dictionary, 6 vols., Oxford: Henry Frowde; via EDD Online 4.0, University of Innsbruck (CC BY 4.0)
9. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins