cancer (English)

Where does "cancer" come from?

The English noun 'cancer' is borrowed from the Latin word 'cancer', which means 'crab'[1][2]. This Latin term traces back through Proto-Italic '*kankros' and '*karkros' to the Proto-Indo-European root '*(s)ker-', meaning 'to turn' or 'bend', through a reduplicated form meaning 'circular' because a crab's pincers form a circle[2][4][5]. The medical sense of the word was established when Latin writers calqued it from the Ancient Greek 'καρκίνος', meaning 'crab', 'ulcer', or 'cancer'[1][2]. The term was applied to malignant tumors because the swollen, protruding veins around them resembled the legs of a crab[1]. Through these developments, the word also shares origins with doublets like 'canker' and 'chancre'.

Open questions

• The medical sense in Latin may be a semantic loan from Ancient Greek, though the two terms are possibly cognate. [1] [2]
• The origin of the Ancient Greek form remains uncertain, with some linguistic elements pointing toward a non-Indo-European Pre-Greek source. [3]

Full etymology tree

• cancer (English), 'A disease in which the cells of a tissue undergo uncontrolled (and often rapid) proliferation.'
  • borrowed cancer (Latin), 'a crab'
    • calque καρκίνος (karkínos) (Ancient Greek), 'crab'
    • inherited *kankros (Proto-Italic), 'enclosure, fence'
      • derived *karkros (Proto-Italic), 'enclosure, barrier; fence, gate'
        • derived *kr̥-kr̥- (Proto-Indo-European)
          • derived *(s)ker- (Proto-Indo-European), 'to cut off, sever'

Ancestors

• *(s)ker- (Proto-Indo-European)
• cancer (Latin)
• καρκίνος (Ancient Greek)

Cognates and doublets

• canker (English)
• chancre (English)

Descendants and derived words

• adenocancer (English)
• anti-cancer (English)
• anticancer (English)
• black cancer (English)
• bladder cancer (English)
• blood cancer (English)
• bone cancer (English)
• boob cancer (English)
• bowel cancer (English)
• brain cancer (English)
• breast cancer (English)
• canceration (English)

Sources

1. cancer (English) - Wiktionary
2. cancer (Latin) - Wiktionary
3. καρκίνος (karkínos) (Ancient Greek) - Wiktionary
4. karkros (Proto-Italic) - Wiktionary
5. kankros (Proto-Italic) - Wiktionary

Updated August 2026

More words starting with C

Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris