defeasible

adjective

de·​fea·​si·​ble di-ˈfē-zə-bəl 

: capable of being annulled or made void

a defeasible claim

defeasibility

di-ˌfē-zə-ˈbi-lə-tē 

noun

Word History

Etymology

alteration (conformed to -ible) of earlier defesable, borrowed from Anglo-French, from de- de- + fesable "doable, feasible," after defaire, desfaire "to undo, put an end to, destroy, nullify" — more at defeat entry 1

First Known Use

15th century, in the meaning defined above

Legal Definition

defeasible

adjective

de·​fea·​si·​ble di-ˈfē-zə-bəl 

: subject to or capable of being annulled or made void

a defeasible interest

his rights are not defeasible by agreement

—J. D. Calamari and J. M. Perillo