Not liable to being annulled or voided or undone.

Roget 150: unchangeable, immutable; unaltered, unalterable; not to be changed, constant; permanent etc. 141; invariable, undeviating; stable, durable; perennial etc. (diuturnal) 110^†.    fixed, steadfast, firm, fast, steady, balanced; confirmed, valid; fiducial^†; immovable, irremovable, riveted, rooted; settled, established etc. v.; vested; incontrovertible, stereotyped, indeclinable.    tethered, anchored, moored, at anchor, on a rock, rock solid, firm as a rock; firmly seated, firmly established etc. v.; deep-rooted, ineradicable; inveterate; obstinate etc. 606.    transfixed, stuck fast, aground, high and dry, stranded.    [movable object rendered unmovable] stuck, jammed; unremovable; quiescent etc. 265; deterioration etc. 659.    indefeasible, irretrievable, intransmutable^†, incommutable^†, irresoluble^†, irrevocable, irreversible, reverseless^†, inextinguishable, irreducible; indissoluble, indissolvable^†; indestructible, undying, imperishable, incorruptible, indelible, indeciduous^†; insusceptible, insusceptible of change.    ... meer laten zien

Roget 924: having a right to etc. v.; entitled to; claiming; deserving, meriting, worthy of.    privileged, allowed, sanctioned, warranted, authorized; ordained, prescribed, constitutional, chartered, enfranchised.    prescriptive, presumptive; absolute, indefeasible; unalienable, inalienable; imprescriptible^†, inviolable, unimpeachable, unchallenged; sacrosanct.    due to, merited, deserved, condign, richly deserved.    allowable etc. (permitted) 760; lawful, licit, legitimate, legal; legalized etc. (law) 963.    square, unexceptionable, right; equitable etc. 922; due, en r gle; fit, fitting; correct, proper, meet, befitting, becoming, seemly; decorous; creditable, up to the mark, right as a trivet; just the thing, quite the thing; selon les r gles [Fr.].    ... meer laten zien