<B>impeachment, </B>noun.<DL COMPACT><DD><B> 1. </B>the act or process of impeaching. <BR> <I>Ex. Edmund G. Ross ... voted decisively against the impeachment of President Andrew Johnson (Newsweek).</I> <DD><B> 2. </B>the condition of being impeached. <BR> <I>Ex. The verdict resulting from his impeachment destroyed his political career.</I> </DL>
<A NAME="impearl">
<B>impearl, </B>transitive verb.<DL COMPACT><DD><B> 1. </B>to form into pearllike drops. <BR> <I>Ex. Dew-drops, which the sun Impearls on every leaf and every flower (Milton).</I> <DD><B> 2. </B>to adorn with pearls or pearllike drops. <BR> <I>Ex. Proud be the rose, with rains and dews Her head impearling (Wordsworth).</I> <DD><B> 3. </B>to make pearllike or pearly. </DL>
<B>impeccable, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> <B>1. </B>faultless; irreproachable. <BR> <I>Ex. impeccable manners, an impeccable appearance. Sir John is impeccable, a paradigm of the gentleman-soldier (Harper's).</I> <DD><B> 2. </B>not to be doubted; unimpeachable. <BR> <I>Ex. According to impeccable sources, the Naval Board met twenty-three times from January 1st to October 22nd (Canadian Saturday Night).</I> <DD><B> 3. </B>not capable of or liable to sin; sinless. <DD><I>noun </I> a person who is impeccable. adv. <B>impeccably.</B> </DL>
<A NAME="impeccance">
<B>impeccance, </B>noun.<DL COMPACT><DD> the quality of being without or free from sin. </DL>
<A NAME="impeccant">
<B>impeccant, </B>adjective.<DL COMPACT><DD> not sinning; sinless; unerring. </DL>
<A NAME="impecuniosity">
<B>impecuniosity, </B>noun.<DL COMPACT><DD> lack of money; poverty. <BR> <I>Ex. Impecuniosity was the caste mark of the demobilized soldier (Samuel Hopkins Adams).</I> </DL>
<A NAME="impecunious">
<B>impecunious, </B>adjective.<DL COMPACT><DD> having little or no money; penniless; poor. <BR> <I>Ex. Certainly an impecunious Subaltern was not a catch (Rudyard Kipling).</I> (SYN) indigent. adv. <B>impecuniously.</B> noun <B>impecuniousness.</B> </DL>
<A NAME="impedance">
<B>impedance, </B>noun.<DL COMPACT><DD><B> 1. </B>(Electricity.) <DD><B> a. </B>the apparent resistance in an alternating-current circuit, made up of two components, reactance and true or ohmic resistance. <DD><B> b. </B>the square root of the sum of the squares of the true resistance and the difference between the inductive reactance and the capacitive reactance. <DD><B> 2. </B>(Physics.) the ratio of the pressure in a sound wave to the product of the particle velocity and the area of a cross section of the wave at a given point. </DL>
<A NAME="impede">
<B>impede, </B>transitive verb, <B>-peded,</B> <B>-peding.</B><DL COMPACT><DD> to stand in the way of; hinder; obstruct. <BR> <I>Ex. The deep snow impeded travel.</I> (SYN) hamper, retard. noun <B>impeder.</B> </DL>
<A NAME="impedient">
<B>impedient, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> impeding; hindering. <DD><I>noun </I> a thing that impedes or hinders. </DL>
<A NAME="impediment">
<B>impediment, </B>noun.<DL COMPACT><DD><B> 1. </B>a hindrance; obstruction. <BR> <I>Ex. As an impediment to South American tourism, the expensiveness of getting to some places is being given serious study (Newsweek).</I> <DD><B> 2. </B>some physical defect, especially a defect in speech. <BR> <I>Ex. Stuttering is a speech impediment. They bring unto him one that was deaf, and had an impediment in his speech (Mark 7:32).</I> <DD><B> 3. </B>(Law.) a bar to the making of a valid marriage contract. </DL>
<A NAME="impedimenta">
<B>impedimenta, </B>noun pl.<DL COMPACT><DD><B> 1. </B>things that impede or encumber progress, such as baggage. <BR> <I>Ex. The impedimenta of modern science was rising about him everywhere he went (New Scientist).</I> <DD><B> 2. </B>the military supplies carried along with an army. <DD><B> 3. </B>(Law.) obstacles; hindrances. </DL>
<A NAME="impedimental">
<B>impedimental, </B>adjective.<DL COMPACT><DD> like an impediment; impeditive. </DL>
<B>impeditive, </B>adjective.<DL COMPACT><DD> tending to impede; obstructive; hindering. </DL>
<A NAME="impel">
<B>impel, </B>transitive verb, <B>-pelled,</B> <B>-pelling.</B><DL COMPACT><DD><B> 1. </B>to drive or force; cause. <BR> <I>Ex. The cold impelled her to go indoors. Hunger impelled the lazy man to work. I cannot tell what impels me to speak thus boldly (Scott).</I> <DD><B> 2. </B>to cause to move; drive forward; push along. <BR> <I>Ex. The wind impelled the boat toward the shore. Projectiles continue in their motions, so far as they are not ... impelled downward by the force of gravity (Science News Letter). The wave behind impels the wave before (John Dryden).</I> </DL>
<A NAME="impellent">
<B>impellent, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> that impels; impelling. <DD><I>noun </I> a thing that impels or urges; impelling force, agent, body, or action. </DL>
<A NAME="impeller">
<B>impeller, </B>noun.<DL COMPACT><DD><B> 1. </B>a person or thing that impels. <DD><B> 2. </B>the rotating blades of a centrifugal pump or blower. </DL>
<A NAME="impend">
<B>impend, </B>intransitive verb.<DL COMPACT><DD><B> 1. </B>to be likely to happen soon; be about to happen; be near. <BR> <I>Ex. Black clouds are signs that a storm impends. When war impends, wise men try to prevent it.</I> <DD><B> 2. </B>to hang threateningly; hang. <BR> <I>Ex. Great boulders impended over the narrow mountain path. (Figurative.) Destruction sure o'er all your heads impends (Alexander Pope).</I> </DL>
<B>impending, </B>adjective.<DL COMPACT><DD><B> 1. </B>likely to happen soon; threatening; about to occur. <BR> <I>Ex. an impending war. There were symptoms of an impending storm (Washington Irving).</I> <DD><B> 2. </B>overhanging. <BR> <I>Ex. Above him were impending cliffs. Aquiline his nose, And overbuilt with most impending brows (William Cowper).</I> </DL>
<A NAME="impenetrability">
<B>impenetrability, </B>noun.<DL COMPACT><DD><B> 1. </B>the quality or condition of being impenetrable. <BR> <I>Ex. Outside, the wind spiraled over an airfield that tapered to white impenetrability (Philip Wylie).</I> <DD><B> 2. </B>(Physics.) the property of matter that prevents two bodies from occupying the same space at the same time. </DL>
<A NAME="impenetrable">
<B>impenetrable, </B>adjective.<DL COMPACT><DD><B> 1. </B>that cannot be entered, pierced, or passed. <BR> <I>Ex. The thorny branches made a thick, impenetrable hedge. A thick sheet of steel is impenetrable by an ordinary bullet. The lowlands presented early explorers with apparently impenetrable jungle (Atlantic).</I> <DD><B> 2. </B>(Figurative.) that cannot be seen into or understood; impossible to explain or understand; inscrutable. <BR> <I>Ex. His sudden disappearance was hidden in an impenetrable mystery.</I> <DD><B> 3. </B>(Figurative.) not open to ideas or influences. <BR> <I>Ex. an impenetrable mind.</I> <DD><B> 4. </B>(Physics.) (of a body) excluding all other bodies from the space it occupies. noun <B>impenetrableness.</B> adv. <B>impenetrably.</B> </DL>
<B>impenitence, </B>noun.<DL COMPACT><DD> lack of any sorrow or regret for doing wrong. </DL>
<A NAME="impenitent">
<B>impenitent, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> not penitent; feeling no sorrow or regret for having done wrong. <BR> <I>Ex. Her anger was directed with almost equal vehemence against Mr. Reeve for his having published "such an abominable book." ... Mr. Reeve, however, was impenitent (Lytton Strachey).</I> <DD><I>noun </I> an impenitent person. adv. <B>impenitently.</B> </DL>
<A NAME="impennate">
<B>impennate, </B>adjective.<DL COMPACT><DD><B> 1. </B>featherless. <DD><B> 2. </B>wingless. <DD><B> 3. </B>having small wings covered with scalelike feathers, as the penguins. </DL>
<A NAME="imper">
<B>imper.,</B><DL COMPACT><DD> imperative. </DL>
<A NAME="imperative">
<B>imperative, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> <B>1. </B>not to be avoided; that must be done; urgent; necessary. <BR> <I>Ex. It is imperative that this very sick child stay in bed.</I> <DD><B> 2. </B>expressing a command, request, or warning; commanding. <BR> <I>Ex. an imperative statement.</I> <DD><B> 3. </B>(Grammar.) having to do with a verb form that expresses a command, request, or warning. "Go!" and "stop, look, listen!" are in the imperative mood. <DD><I>noun </I> <B>1. </B>something imperative; command. <BR> <I>Ex. The great imperative is "Love thy neighbor as thyself."</I> <DD><B> 2. </B>(Grammar.) <DD><B> a. </B>the imperative mood. <DD><B> b. </B>a verb form that expresses a command, request, or warning. In "Try to be quiet" and "Make up your mind," <I>try</I> and <I>make</I> are imperatives. A verb in the imperative mood has the form of the infinitive. adv. <B>imperatively.</B> noun <B>imperativeness.</B> </DL>
<A NAME="imperator">
<B>imperator, </B>noun.<DL COMPACT><DD><B> 1. </B>an absolute or supreme ruler. <DD><B> 2. </B>the Roman emperor. <DD><B> 3. </B>the title given to a victorious Roman military commander. </DL>
<B>imperceptibility, </B>noun.<DL COMPACT><DD> the quality or state of being imperceptible. </DL>
<A NAME="imperceptible">
<B>imperceptible, </B>adjective.<DL COMPACT><DD><B> 1. </B>very slight; gradual. <BR> <I>Ex. The road took an imperceptible rise over the low hill.</I> <DD><B> 2. </B>that cannot be perceived or felt; subtle or indistinct. <BR> <I>Ex. There were imperceptible differences between the original painting and the copy. The process by which this result was reached had been so gradual as to be almost imperceptible (Lytton Strachey).</I> noun <B>imperceptibleness.</B> adv. <B>imperceptibly.</B> </DL>
<A NAME="imperceptive">
<B>imperceptive, </B>adjective.<DL COMPACT><DD> not perceptive; lacking perception. <BR> <I>Ex. About the theatre he is equally unfair, or imperceptive (New Statesman).</I> noun <B>imperceptiveness.</B> </DL>
<A NAME="imperceptivity">
<B>imperceptivity, </B>noun.<DL COMPACT><DD> the quality of being imperceptive. </DL>
