icosa-

prefix

twenty

OriginAncient Greek εἴκοσι (eíkosi) ← Proto-Hellenic *ewī́kəti ← Proto-Indo-European *(h₁)wídḱm̥ti →
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Meanings

prefix

alternative eicosa- · alternative icosi-

  1. twenty

Origin

  1. Proto-Indo-European*dwóh₁
  2. Proto-Indo-European*dwi-
  3. Proto-Indo-European*déḱm̥
  4. Proto-Indo-European*(h₁)wídḱm̥ti
  5. Proto-Hellenic*ewī́kəti
  6. Ancient Greekεἴκοσι (eíkosi)
  7. Englishicosa-

Borrowed from Ancient Greek εἴκοσι (eíkosi, “twenty”).

More words from Ancient Greek

Full word history & related roots →
Cite this entry
APA

icosa-. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/icosa-

MLA

“icosa-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/icosa-. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “icosa-,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/icosa-.

Source: icosa- on Wiktionary, CC BY-SA 4.0.