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Not deniable; incapable of denial; palpably true; indisputable; obvious; as, undeniable evidence.

Incapable of being parted; inseparable. [Obs.] Chaucer. Wyclif.

Committing no mistake; incapable or error or failure certain; sure; unfailing; as, the unerring wisdom of God. Hissing in air the unerring weapon flew. Dryden.

Incapable of being expressed; inexpressible; unutterable; ineffable. [Obs.] Run, run, Orlando; carve on every tree The fair, the chaste and unexpressive she. Shak. -- Un`ex*press"ive*ly, adv.

Incapable of being foreseen. South.

Not frankable; incapable of being sent free by public conveyance.

Not iterable; incapable of being repeated. [Obs.] "To play away an uniterable life." Sir T. Browne.

Incapable of being mastered or subdued. [Obs.] Sir T. Browne.

Incapable of being mistaken or misunderstood; clear; plain; obvious; evident. -- Un`mis*tak"a*bly, adv.

Incapable of having a peer, or equal.

Incapable of being sounded. [Obs.]

Not speakable; incapable of being uttered or adequately described; inexpressible; unutterable; ineffable; as, unspeakable grief or rage. -- Un*speak"a*bly, adv. Ye rejoice with joy unspeakable and full of glory. 1 Pet. i. 8.

Incapable of being treated; not practicable. [R.] Dr. H. More.

To make incapable of harmony, or of harmonious action; to put out of tune. Shak.

Not utterable; incapable of being spoken or voiced; inexpressible; ineffable; unspeakable; as, unutterable anguish. Sighed and looked unutterable things. Thomson. -- Un*ut"ter*a*ble*ness, n. -- Un*ut"ter*a*bly, adv.

Incapable of being uttered. [Obs.] A clamoring debate of utterless things. Milton.

Having legal strength or force; executed with the proper formalities; incapable of being rightfully overthrown or set aside; as, a valid deed; a valid covenant; a valid instrument of any kind; a valid claim or title; a valid marriage.

Of no legal force or effect, incapable of confirmation or ratification; null. Cf. Voidable, 2. Void space (Physics), a vacuum.

Incapable of being wearied.

A New Zealand rail (Ocydromus australis) which has wings so short as to be incapable of flight.