abrupt

Etymology

It is borrowed from Latin abruptus (“broken off; steep, sheer; disconnected”),^{[2][3][4][5][6]} the past participle of abrumpō (“to break off”),^[5][6][7][8] formed from ab- (“off, away”) and rumpō (“to break”).^[5][3][6][9] The Latin verb rumpō is a nasal present formation from Proto-Indo-European *reu̯p- (“to break, tear”),^[4] and is also the source of rupture.^[6][7][8]

Earliest recorded meaning

Broken off, cut short: the OED's first quotation is from J. Rastell's Replie (1565),^[2] and Barnhart's from 1583, with the sense "broken away".^[6] The OED records a short-lived sense "broken away from restraint, dissolute" in Stubbes's Anatomie of Abuses (1583).^[2][9]

Semantic evolution

Etymonline treats the English word as a figurative use of the Latin from the start, and the senses followed quickly in the late 16th century.^[3] Used of writing it meant disjointed, passing suddenly from one thought to another (1566);^[2][3] of a change or movement, sudden and unexpected (1576);^[2] and of a person or a person's manner, curt or brusque (1578, in Lyly's Euphues).^[2] Barnhart finds "sudden, hasty" in Shakespeare's 1 Henry VI (1591).^[6] The sense of the Latin adjective "steep, precipitous", used of cliffs and slopes, appears in 1591;^[2][7] Johnson (1755) listed "broken, craggy" first.^[10] From 1624 to the late 19th century abrupt was also a noun for a steep place or an abyss, as in Milton's "the vast abrupt" in Paradise Lost.^[2][11] Later technical uses are in botany, of a part of a plant ending suddenly rather than tapering (1754),^[2][12] and briefly in geology (1808–33).^[2] A verb abrupt, to break off, borrowed from the Latin stem, is recorded from 1634 and is now archaic.^[2][4]

Timeline

• 1565 – broken off, cut short (obsolete by 1790).^[2]
• 1566 – of style, disjointed, without smooth transitions.^[2]
• 1576 – sudden, unexpected, hasty.^[2]
• 1578 – of a person or manner, curt or brusque.^[2]
• 1583 – broken away from restraint, dissolute (obsolete).^[2][9]
• 1591 – of a slope or rock face, steep, precipitous.^[2]
• 1624 – noun, a steep place, a precipice, an abyss (obsolete by 1887).^[2]
• 1634 – verb, to break off, sever.^[2][4]
• 1754 – in botany, ending suddenly rather than tapering.^[2]

Meanings

Adjective

1. Happening suddenly and without warning: The meeting came to an abrupt end when the lights went out.^[12][13][4]
2. Short and curt in speech or manner, to the point of rudeness; brusque: His abrupt reply left her wondering what she had done wrong.^[12][13][2]
3. Of speech or writing, passing suddenly from one subject to another; disconnected.^[12][13][2]
4. Very steep; precipitous: an abrupt drop to the river.^[12][13][4]
5. (botany) Ending suddenly rather than tapering; truncate.^[12][13][2]
6. (obsolete, 1565–1790) Broken off; cut short.^[2][10]

Noun

1. (obsolete, 1624–1887) A steep place or precipice; an abyss.^[2][11]

Verb

1. (archaic) To break off or sever; to interrupt suddenly.^[4][2]

Word family

• abruptly
• abruptness
• abruption

Related words

• rupture
• corrupt
• interrupt
• erupt
• disrupt
• bankrupt
• rout

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 Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e f g Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
5. ^ a b c The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
6. ^ a b c d e f Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
7. ^ a b c Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
8. ^ a b Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
9. ^ a b c Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
10. ^ a b Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
11. ^ a b Cresswell, Julia (2021), Oxford Dictionary of Word Origins, 3rd ed., Oxford: Oxford University Press
12. ^ a b c d e f The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
13. ^ a b c d e Collins English Dictionary (2023), Glasgow: HarperCollins