canker

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English

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Pronunciation

Etymology 1

From Middle English canker, cancre, from Old English cancer, akin to Dutch kanker, Old High German chanchar. Ultimately from Latin cancer (“a cancer”). Doublet of cancer, a later borrowing from Latin, and chancre, which came through French.

Noun

canker (countable and uncountable, plural cankers)

  1. (phytopathology) A plant disease marked by gradual decay.
  2. A region of dead plant tissue caused by such a disease.
    • 1977, The Potato: Major Diseases and Nematodes, International Potato Center, page 46:
      Slightly sunken brown cankers of variable size and shape affect stem parts primarily below the soil line.
  3. A worm or grub that destroys plant buds or leaves; cankerworm.
  4. A corroding or sloughing ulcer; especially a spreading gangrenous ulcer or collection of ulcers in or about the mouth.
  5. Anything which corrodes, corrupts, or destroys.
    • c. 1690, Sir William Temple, Of Heroick Virtue:
      the cankers of envy and faction
    • 1941, Theodore Roethke, “Feud”, in Open House; republished in The Collected Poems of Theodore Roethke, 1975, →ISBN, page 4:
      There’s canker at the root, your seed
      Denies the blessing of the sun,
      The light essential to your need.
      Your hopes are murdered and undone.
  6. A kind of wild rose; the dog rose.
  7. An obstinate and often incurable disease of a horse's foot, characterized by separation of the horny portion and the development of fungoid growths. Usually resulting from neglected thrush.
  8. An avian disease affecting doves, poultry, parrots and birds of prey, caused by Trichomonas gallinae.
Synonyms
  • (ulcer, especially of the mouth): water canker, canker of the mouth, noma
  • (bird disease): avian trichomoniasis, roup
  • (hawk disease): frounce
Derived terms
Translations

Etymology 2

From Middle English cankren, from the noun (see above).

Verb

canker (third-person singular simple present cankers, present participle cankering, simple past and past participle cankered)

  1. (transitive) To affect as a canker; to eat away; to corrode; to consume.
  2. (transitive) To infect or pollute; to corrupt.
  3. (intransitive) To waste away, grow rusty, or be oxidized, as a mineral.
  4. (intransitive) To be or become diseased, or as if diseased, with canker; to grow corrupt; to become venomous.
    • 1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies  (First Folio), London: Isaac Iaggard, and Ed Blount, published 1623, →OCLC, :
      as with age his body uglier grows,
      So his mind cankers.
    • 1972, E. M. Forster, chapter 36, in Maurice‎, Penguin, page 156:
      […] the road, always in bad condition, was edged with dog roses that scratched the paint. Blossom after blossom crept past them, draggled by the ungenial year: some had cankered, others would never unfold:

References

Anagrams

Scots

Alternative forms

Etymology

Middle English canker, cancre, Old English cancer, akin to Dutch kanker, Old High German chanchar. From Latin cancer (“a cancer”).

Pronunciation

Noun

canker (plural cankers)

  1. Bad temper.

Verb

canker (third-person singular simple present cankers, present participle cankerin, simple past cankert, past participle cankert)

  1. (archaic) To become bad-tempered, to fret, to worry.
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