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Excitable; susceptible of strong emotion.

That may be impeached; liable to impeachment; chargeable with a crime. Owners of lands in fee simple are not impeachable for waste. Z. Swift.

Not liable to sin; exempt from the possibility of doing wrong. -- n.

Incapable of being penetrated or pierced; 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.

Imperceptible. [R.] South. -- Im`per*ceiv"a*ble*ness, n. Sharp.

Incapable of being perforated, or bored through.

ot perisha ble; not subject to decay; indestructible; enduringpermanently; as, an imperishable monument; imperishable renown. -- Im*per"ish*a*ble*ness, n. -- Im*per"ish*a*bly, adv.

Not permeable; not permitting passage, as of a fluid. through its substance; impervious; impenetrable; as, India rubber is impermeable to water and to air. -- Im*per"me*a*ble*ness, n. -- Im*per"me*a*bly, adv.

Not capable of being searched out; inscrutable. [Obs.] -- Im`per*scru"ta*ble*ness, n. [Obs.]

Not to be persuaded; obstinate; unyielding; impersuasible. -- Im`per*suad"a*ble*ness, n.

Incapable of being disturbed or disconcerted; as, imperturbable gravity.

Not pervious; impervious. [R.] -- Im*per"vi*a*ble*ness, n. [R.]

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

Not capable of being pierced; impenetrable. [Obs.] Spenser.

Not placable; not to be appeased; incapable of being pacified; inexorable; as, an implacable prince. I see thou art implacable. Milton. An object of implacable enmity. Macaulay.

The quality of being implacable; implacability.

Not admitting excuse, evasion, or plea; rigorous. [R.] T. Adams.

Not pliable; inflexible; inyielding.

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