indefeasible

play
adjective in·de·fea·si·ble \ ˌin-di-ˈfē-zə-bəl \

Definition of indefeasible

:not capable of being annulled or voided or undone
  • an indefeasible right

indefeasibility

play \ˌin-di-ˌfē-zə-ˈbi-lə-tē\ noun

indefeasibly

play \ˌin-di-ˈfē-zə-blē\ adverb

indefeasible was our Word of the Day on 12/13/2009. Hear the podcast!

Did You Know?

We acquired "indefeasible" in the mid-16th century by combining the English prefix in- ("not") with "defeasible," a word borrowed a century earlier from Anglo-French. "Defeasible" itself can be traced to an Old French verb meaning "to undo" or "to destroy." It's no surprise, then, that something indefeasible is essentially "un-undoable" or "indestructible." Another member of this family of words is feasible, meaning "capable of being done or carried out." Ultimately, all three - "indefeasible," "defeasible," and "feasible" - can be traced back to the Latin verb facere, meaning "to do."

First Known Use of indefeasible

1548


Law Dictionary

indefeasible

play
adjective in·de·fea·si·ble \ ˌin-di-ˈfē-zə-bəl \

legal Definition of indefeasible

:not capable of being annulled or voided
  • an indefeasible right

indefeasibly

adverb

Learn More about indefeasible


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