Etymology

fungible

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Today it means: Able to be substituted for something of equal value or utility. Full definition →

Medieval Latin fungibilis ← Latin fungor
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The story

  1. Latin · derived fromfungor“to perform, discharge a duty”
  2. Medieval Latin · borrowed fromfungibilis
  3. English todayfungible

1765 as noun, 1818 as adjective, from Medieval Latin fungibilis, from Latin fungor (“to perform, discharge a duty”) + -ible (“able to”). Originally a legal term, going back to Roman law: res fungibiles (“replaceable things”).

Etymology from Wiktionary, CC BY-SA 4.0.