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| impractical | 
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| a. [허무] unwise to implement or maintain in practice; theoretical Refloating the sunken ship proved impractical because of the great expense. | 
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| inability | 
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| n. [능력을 포기 무능력] lack of ability, especially mental ability, to do something They let her go because of her inability to meet obligations under her contract. | 
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| inaccessible | 
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| a. [액세스할] unreachable; not available; unattainable There's a similar picture in Victoria, where dozens of fire-fronts continued to advance through inaccessible mountain regions. | 
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| inadequate | 
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| a. [불충 분한] not sufficient to meet a need; insufficient; poor He does not satisfy his inadequate income. | 
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| incense | 
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| v. [향] enrage; infuriate; cause to be extremely angry Cruelty to defenseless animals will incense Caroline. | 
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| incompatible | 
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| a. [호환성] inharmonious; impossible to coexist; not easy to combine harmoniously The married couple argued incessantly and finally decided to separate because they were incompatible. | 
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| inconvenient | 
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| a. [불편한] not suited to your comfort, purpose, or needs It is inconvenient not to have a telephone in the kitchen. | 
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| incredulous | 
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| a. [믿지] difficult to believe; incredible; skeptical When Jack claimed he hadn't eaten the jelly doughnut, Jill took an incredulous look at his smeared face and laughed. | 
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| indent | 
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| v. [들여쓰기] nick; set in from margin;  impress or stamp It will help if you indent the paragraphs of a letter. | 
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| independent | 
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| a. [독립] not dependent; free; not subject to control by others; not relying on others Tom decided that he could be independent of Becky Thatcher now. | 
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| indicative | 
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| a. [지표] suggestive; implying; serving to indicate There are numerous examples, but the most indicative is probably in Southwestern Pennsylvania. | 
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| indifference | 
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| n. [무관심] unconcern; disinterest; lack of enthusiasm The court did issue a stinging rebuke for what it calls their indifference to their constitutional duties. | 
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| indigestion | 
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| n. [소화 불량] a disorder of digestive function; difficulty in digesting If you're plagued by indigestion, take garlic supplements after lunch and after dinner. | 
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