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; not admitting the passage of other bodies; not to be entered; impervious; as, an impenetrable shield. Highest woods impenetrable To star or sunlight. Milton.

The quality of being impenetrable; impenetrability.

In an impenetrable manner or state; imperviously. "Impenetrably armed." Milton. "Impenetrably dull." Pope.

Incapable of being perforated, or bored through.

Capable of being obtained or moved by petition. [Obs.] Bailey.

The quality or state of being imponderable; imponderableness.

Not ponderable; without sensible or appreciable weight; incapable of being weighed.

The quality or state of being imponderable.

The quality of being unalterable or unchangeable; permanence.

Not alterable; incapable of being altered or changed; unalterable. -- In*al"ter*a*ble*ness, n. -- In*al"ter*a*bly, adv.

Not arable. [R.]

Not censurable. Dr. T. Dwight. -- In*cen"sur*a*bly, adv.

Untamable. [R.]

Capable of being incinerated or reduced to ashes. Sir T. Browne.

The quality or state of being incommensurable. Reid.

Not commensurable; having no common measure or standard of comparison; as, quantities are incommensurable when no third quantity can be found that is an aliquot part of both; the side and diagonal of a square are incommensurable with each other; the diameter and circumference of a circle are incommensurable. They are q…

Not comparable; admitting of no comparison with others; unapproachably eminent; without a peer or equal; matchless; peerless; transcendent. A merchant of incomparable wealth. Shak. A new hypothesis . . . which hath the incomparable Sir Isaac Newton for a patron. Bp. Warburton. -- In*com"pa*ra*ble*ness, n. -- In*com"pa…

Not considerable; unworthy of consideration or notice; unimportant; small; trivial; as, an inconsiderable distance; an inconsiderable quantity, degree, value, or sum. "The baser scum and inconsiderable dregs of Rome." Stepney. -- In`con*sid"er*a*ble*ness, n. -- In`con*sid"er*a*bly, adv.

The state of being uncurable; irremediableness. Harvey.

Not capable of being cured; beyond the power of skill or medicine to remedy; as, an incurable disease. A scirrh is not absolutely incurable. Arbuthnot.