defeasive
defeasive a. (行为、权利、协议等)可被宣布无效的；可被撤销的
DEFEASIVE
defeasive
defeasive, adj. Rare. Capable of defeating (a counterclaim defeasive of the plaintiff’s right to recovery).
defeasive, adj. Rare. Capable of defeating (a counterclaim defeasive of the plaintiff’s right to recovery).