英[dɪ\'fi:zəbl]
美[dɪ\'fizəbəl]
A defeasible interest is insurable, as also is a contingent interest.
可撤销的利益是保险利益, 偶然的利益亦然.
互联网
"a claim to an estate may be defeasible so long as the claimant is under 21 and unmarried"