Imperilment noun The act of imperiling, or the state of being imperiled.

Imperious adjective [ Latin imperiosus : confer French impérieux . See Imperial .]
1. Commanding; ascendant; imperial; lordly; majestic. [ Obsolete] "A vast and imperious mind." Tilloison.

Therefore, great lords, be, as your titles witness,
Imperious .

Shak.

2. Haughly; arrogant; overbearing; as, an imperious tyrant; an imperious manner.

This imperious man will work us all
From princes into pages.

Shak.

His bold, contemptuous, and imperious spirit soon made him conspicuous.

Macaulay.

3. Imperative; urgent; compelling.

Imperious need, which can not be withstood.

Dryden.

Syn. -- Dictatorial; haughty; domineering; overbearing; lordly; tyrannical; despotic; arrogant; imperative; authoritative; commanding; pressing. -- Imperious , Lordly , Domineering . One who is imperious exercises his authority in a manner highly offensive for its spirit and tone; one who is lordly assumes a lofty air in order to display his importance; one who is domineering gives orders in a way to make others feel their inferiority.

Imperiously adverb In an imperious manner.

Imperiousness noun The quality or state of being imperious; arrogance; haughtiness.

Imperiousness and severity is but an ill way of treating men who have reason of their own to guide them.

Locke.

Imperishability noun The quality of being imperishable: indstructibility. "The imperishability of the universe." Milman.

Imperishable adjective [ Prefix im- not + perishable : confer French impérissable .] Not perishable; not subject to decay; indestructible; enduring permanently; as, an imperishable monument; imperishable renown. -- Im*per"ish*a*ble*ness , noun -- Im*per"ish*a*bly , adverb

Imperium noun ; plural Imperia . [ Latin See Empire .]
1. Supreme power; absolute dominion; empire.

2. (Law) The right to command, which includes the right to employ the force of the state to enforce the laws. It is one of the principal attributes of the executive power.

Imperiwigged adjective Wearing a periwig.

Impermanence, Impermanency noun lack of permanence.

Impermanent adjective Not permanent.

Impermeability noun [ Prefix im- not + permeability : confer French imperméabilité .] The quality of being impermeable.

Impermeable adjective [ Prefix im- not + permeable : confer French imperméable , Latin impermeabilis .] 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 , noun -- Im*per"me*a*bly , adverb

Impermissible adjective Not permissible.

Imperscrutable adjective [ Latin imperscrutabilis .] Not capable of being searched out; inscrutable. [ Obsolete] -- Im`per*scru"ta*ble*ness , noun [ Obsolete]

Imperseverant adjective Not persevering; fickle; thoughtless. [ Obsolete]

Impersonal adjective [ Latin impersonalis ; prefix im- not + personalis personal: confer French impersonnel . See Personal .] Not personal; not representing a person; not having personality.

An almighty but impersonal power, called Fate.

Sir J. Stephen.

Impersonal verb (Gram.) , a verb used with an indeterminate subject, commonly, in English, with the impersonal pronoun it ; as, it rains ; it snows ; methinks (it seems to me). Many verbs which are not strictly impersonal are often used impersonally; as, it goes well with him.

Impersonal noun That which wants personality; specifically (Gram.) , an impersonal verb.

Impersonality noun The quality of being impersonal; want or absence of personality.

Impersonally adverb In an impersonal manner.

Impersonate transitive verb [ imperfect & past participle Impersonated ; present participle & verbal noun Impersonating .]
1. To invest with personality; to endow with the form of a living being.

2. To ascribe the qualities of a person to; to personify.

3. To assume, or to represent, the person or character of; to personate; as, he impersonated Macbeth.

Benedict impersonated his age.

Milman.

Impersonation, Impersonification noun The act of impersonating; personification; investment with personality; representation in a personal form.

Impersonator noun One who impersonates; an actor; a mimic.

Imperspicuity noun Want of perspicuity or clearness; vagueness; ambiguity.

Imperspicuous adjective Not perspicuous; not clear; obscure; vague; ambiguous.

Impersuadable adjective [ Confer Impersuasible .] Not to be persuaded; obstinate; unyielding; impersuasible. -- Im`per*suad"a*ble*ness , noun

Impersuasible adjective [ Prefix im- not + persuasible : confer Old French impersuasible .] Not persuasible; not to be moved by persuasion; inflexible; impersuadable. Dr. H. More. -- Im`per*sua`si*bil"i*ty noun

Impertinence noun [ Confer French impertinence . See Impertinent .]
1. The condition or quality of being impertinent; absence of pertinence, or of adaptedness; irrelevance; unfitness.

2. Conduct or language unbecoming the person, the society, or the circumstances; rudeness; incivility.

We should avoid the vexation and impertinence of pedants who affect to talk in a language not to be understood.

Swift.

3. That which is impertinent; a thing out of place, or of no value.

There are many subtile impertinences learned in schools.

Watts.

Impertinency noun Impertinence. [ R.]

O, matter and impertinency mixed!
Reason in madness!

Shak.

Impertinent adjective [ French, from Latin impertinens , -entis ; prefix im- not + pertinens . See Pertinent .]
1. Not pertinent; not pertaining to the matter in hand; having no bearing on the subject; not to the point; irrelevant; inapplicable.

Things that are impertinent to us.

Tillotson.

How impertinent that grief was which served no end!

Jer. Taylor.

2. Contrary to, or offending against, the rules of propriety or good breeding; guilty of, or prone to, rude, unbecoming, or uncivil words or actions; as, an impertient coxcomb; an impertient remark.

3. Trifing; inattentive; frivolous.

Syn. -- Rude; officious; intrusive; saucy; unmannerly; meddlesome; disrespectful; impudent; insolent. -- Impertinent , Officious , Rude . A person is officious who obtrudes his offices or assistance where they are not needed; he is impertinent when he intermeddles in things with which he has no concern. The former shows a want of tact, the latter a want of breeding, or, more commonly, a spirit of sheer impudence. A person is rude when he violates the proprieties of social life either from ignorance or wantonness. "An impertinent man will ask questions for the mere gratification of curiosity; a rude man will burst into the room of another, or push against his person, inviolant of all decorum; one who is officious is quite as unfortunate as he is troublesome; when he strives to serve, he has the misfortune to annoy." Crabb. See Impudence , and Insolent .

Impertinent noun An impertinent person. [ R.]

Impertinently adverb In an impertinent manner. "Not to betray myself impertinently ." B. Jonson.

Impertransibility noun The quality or state of being impertransible. [ R.]

Impertransible adjective [ Latin prefix im- not + pertransire to go through. See Per- and Transient .] Incapable of being passed through. [ R.]

Imperturbability noun The state or quality of being imperturbable.
[ 1913 Webster]

Imperturbable adjective [ Latin imperturbabilis ; prefix im- not + perturbare to disturb: confer French imperturbable . See Perture .] Incapable of being disturbed or disconcerted; as, imperturbable gravity.

Imperturbably adverb In an imperturbable manner; calmly. C. Bronté.

Imperturbation noun [ Latin imperturbatio .] Freedom from agitation of mind; calmness; quietude. W. Montagu.

Imperturbed adjective Not perturbed.

Imperviability noun The quality of being imperviable.

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

Impervious adjective [ Latin impervius ; prefix im- not + per through + via way. See Voyage .] Not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air.

This gulf impassable, impervious .

Milton.

The minds of these zealots were absolutely impervious .

Macaulay.

Syn. -- Impassable; pathless; impenetrable; imperviable; impermeable.

-- Im*per"vi*ous*ly , adverb -- Im*per"vi*ous*ness , noun

Impery noun Empery. [ Archaic] Joye.

Impest transitive verb To affict with pestilence; to infect, as with plague. [ Obsolete]

Impester transitive verb See Pester . [ Obsolete]

Impetiginous adjective [ Latin impetiginous : confer French impétigineux .] Of the nature of, or pertaining to, impetigo.

Impetigo noun [ Latin , from impetere to attack.] (Medicine) A cutaneous, pustular eruption, not attended with fever; usually, a kind of eczema with pustulation.

Impetrable adjective [ Latin impetrabilis : confer French impétrable . See Impetrate .] Capable of being obtained or moved by petition. [ Obsolete] Bailey.

Impetrate adjective [ Latin impetratus , past participle of impetrare to obtain; prefix im- in + patrare to bring to pass.] Obtained by entreaty. [ Obsolete] Ld. Herbert.

Impetrate transitive verb [ imperfect & past participle Impetrated ; present participle & verbal noun Impetrating .] To obtain by request or entreaty. Usher.

Impetration noun [ Latin impetratio : confer French impétration .]
1. The act of impetrating, or obtaining by petition or entreaty. [ Obsolete]

In way of impertation procuring the removal or allevation of our crosses.

Barrow.

2. (Old Eng. Law) The obtaining of benefice from Rome by solicitation, which benefice belonged to the disposal of the king or other lay patron of the realm.