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Etymology and origin of the English word rusty

Pronunciation

rusty1 covered with rust

Confidence
Established
Formation
Derivation
First attested
Old English translation of Orosius
Ultimate origin
Old English rūst

Etymology

The adjective meaning covered with rust is inherited from Middle English rusti,[2] inherited from Old English rūstig,[3][4][5][6] formed from Old English rūst + -ig, from rust.[3][7][8][5] It is cognate with West Frisian roastich, Middle Dutch roestich, Dutch roestig, Old High German rostag and German rostig,[5][9] and early modern Danish had rustig.[9] The OED notes that it may be a separate formation in each language rather than one inherited word.[9] Wiktionary reconstructs Proto-Germanic *rustagaz.[1]

Earliest recorded meaning

Of metal: covered or corroded with rust: in the Old English translation of Orosius, where the bolts of the doors of Janus are rustega.[9][6] Merriam-Webster dates it to before the 12th century.[3]

Semantic evolution

In Piers Plowman (c. 1390) the word meant morally corrupt, a figurative sense that later died out.[9][7] From before 1425, in the Romaunt of the Rose, it described an old person who looked worn and shabby.[9] The OED notes that in the 16th and 17th centuries it was often a term of general disparagement.[9][5] John Trevisa used it for the colour of rust before 1398.[9] It was used of rough, unpolished poetry from about 1425, chiefly in Scotland,[9] and of a harsh or croaking voice from about 1430.[9] The now common sense "out of practice" began with people weakened by age or idleness, in William Dunbar about 1507,[9][5] and was extended to knowledge and skills impaired by disuse from 1575.[9] Etymonline dates this extension to mental skills and learning only to 1796.[5] Of clothes, rusty meant faded and shabby from about 1460.[9] From 1549 it also meant antiquated or old-fashioned.[9] Johnson (1755) defined it first as "covered with rust; infected with rust".[10]

Timeline

  • Old English – covered or corroded with rust.[9][6]
  • c. 1390 – morally corrupt (obsolete).[9]
  • before 1398 – of the colour of rust.[9]
  • before 1425 – of an old person, shabby or decrepit in appearance.[9]
  • c. 1430 – of a sound or voice, harsh, croaking.[9]
  • before 1460 – of clothing, faded through use.[9]
  • c. 1507 – of a person, impaired by age or inactivity.[9]
  • 1549 – antiquated, old-fashioned.[9]
  • 1575 – of knowledge or skills, impaired by disuse.[9]

Meanings

Adjective

  1. Covered with or affected by rust: a rusty gate.[11][3][9]
  2. Of the colour of rust; reddish-brown.[11][9]
  3. Out of practice; less skilful through lack of use: My Spanish is a bit rusty.[11][3][9]
  4. Of clothing, faded or discoloured with age; shabby.[11][9]
  5. Of a voice, hoarse or croaking.[11][9]
  6. Old-fashioned; antiquated.[11][9]
  7. (obsolete, 1390–1910) Morally corrupt; wicked.[9][7]

Word family

  • rustily
  • rustiness

rusty2 restive, bad-tempered

Confidence
Probable
Formation
Derivation
First attested
1555 Heywood, Two Hundred Epigrammes

Etymology

The adjective meaning restive or bad-tempered is an alteration of resty,[3][9][7][12] probably through association with rusty "covered with rust".[9][7][3] Resty itself was a variant of restiff, the earlier form of restive.[9][12]

Earliest recorded meaning

Of a horse, refusing to go forward, hard to control: 1555, in John Heywood's Two Hundred Epigrammes.[9][3]

Semantic evolution

From the horse the word passed to people: stubborn and refractory from 1625,[9] and bad-tempered or angry from 1694, often in to turn rusty.[9] Green's Dictionary of Slang records the sense "ill-tempered" already in 1600, in John Marston.[13] The phrases to ride rusty (1709) and to run rusty (1718) meant to be obstinate or to take offence,[9][7] and in American colloquial use to cut a rusty (1835) meant to play a prank or show a burst of energy.[9] Merriam-Webster labels the ill-tempered sense chiefly dialectal.[3]

Timeline

  • 1555 – of a horse, restive.[9][3]
  • 1600 – ill-tempered.[13]
  • 1625 – refractory, stubborn (obsolete by 1659).[9]
  • 1694 – of a person, bad-tempered, angry.[9]
  • 1709 – to ride rusty.[9]
  • 1835 – U.S., a prank or outburst, in to cut a rusty.[9]

Meanings

Adjective

  1. (chiefly dialect) Surly or bad-tempered; irritable.[3][7][9]
  2. Of a horse, restive and hard to control.[3][9][7]

Usage notes

A third rusty, meaning rancid, used especially of bacon, is a variant of resty in the sense "rancid", from French resté, left over; it is recorded from about 1521 and survives in dialect.[9][7][12]

References

  1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  3. ^ a b c d e f g h i j k l Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  4. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
  5. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  6. ^ a b c Bosworth, Joseph; Toller, T. Northcote (1898), An Anglo-Saxon Dictionary, Oxford: Clarendon Press; Toller, T. Northcote (1921), Supplement
  7. ^ a b c d e f g h i Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  8. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
  9. ^ 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 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  10. ^ 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 c d e f Collins English Dictionary (2023), Glasgow: HarperCollins
  12. ^ a b c Weekley, Ernest (1921), An Etymological Dictionary of Modern English, London: John Murray
  13. ^ a b Green, Jonathon (2010), Green's Dictionary of Slang, London: Chambers; digital ed. 2016–, https://greensdictofslang.com

Related etymologies

Cite this entry

“Rusty.” Etymologically, 26 Oct. 2026, etymologically.com/en/rusty. Accessed 27 Oct. 2026.

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