defeasible

Back-formation from defeasance +‎ -ible, from Anglo-Norman defesaunce, Old French desfaisance, a deverbal noun from desfaire (“to undo”) (Modern French défaire), from des- (“un-, apart”) + fere, faire (“to do”) + -able, reflecting Latin dis- + facere + -ābilis. Near-doublet of defeatable.

• (UK) IPA^(key): [dɪˈfiːzɪbəɫ]

defeasible (comparative more defeasible, superlative most defeasible)

1. (law, logic) Capable of being defeated, terminated, annulled, voided or invalidated.

   The accounting charge for the non-callable debt is defeasible by an escrow.

   • 2011 September 21, Barbara C. Scholz, Francis Jeffry Pelletier, Geoffrey K. Pullum, Ryan Nefdt, “Philosophy of Linguistics”, in Edward N. Zalta, Uri Nodelman, editors, Stanford Encyclopedia of Philosophy‎^[1], Stanford University, →ISSN, retrieved 18 June 2025:

     Languages are acquired mainly through the exercise of defeasible inductive methods, based on experience of linguistic communication.