indefeasible

[ in-di-fee-zuh-buh l ]

/ ˌɪn dɪˈfi zə bəl /

not defeasible; not to be annulled or made void; not forfeitable.

Origin of indefeasible

First recorded in 1540–50; in-³ + defeasible

in·de·fea·si·bil·i·ty, in·de·fea·si·ble·ness, noun in·de·fea·si·bly, adverb

And it was her indefeasible belief that Jean-Marie was dull.

The Works of Robert Louis Stevenson |Robert Louis Stevenson
Gregariousness is the fixed rule, the indefeasible law of that race; you never see them but in shoals.

The Sea |Jules Michelet
They are prepared to say concerning the experience of God and the soul, that they know these with an indefeasible certitude.

Edward Caldwell Moore |Edward Moore
Will they then recognize, and so soon, that Time and the elements have an indefeasible claim upon their bodies?

The New Adam and Eve (From "Mosses From An Old Manse") |Nathaniel Hawthorne

This act enabled any landowner to register an indefeasible title on production of strict proof.

Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 2 |Various

indefeasible

/ (ˌɪndɪˈfiːzəbəl) /

law not liable to be annulled or forfeited

indefeasibility or indefeasibleness, noun indefeasibly, adverb