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
Legal Definition of indefeasible
: not capable of being annulled or voided an indefeasible right
Learn More about indefeasible
Seen and Heard
What made you want to look up indefeasible? Please tell us where you read or heard it (including the quote, if possible).