undefeasible

== English == === Etymology === From un- +‎ defeasible. === Adjective === undefeasible (comparative more undefeasible, superlative most undefeasible) Obsolete form of indefeasible. === References === “undefeasible”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.