Etymology

dual

D2U1A1L1

Today it means: Characterized by having two (usually equivalent) components. Full definition →

Latin dualis
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The story

  1. Latin · borrowed fromdualis“two”
  2. English todaydual

PIE word *dwóh₁ Borrowed from Latin dualis (“two”), from duo (“two”) + adjective suffix -alis.

Etymology from Wiktionary, CC BY-SA 4.0.