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ill-gotten obtained by dishonest or evil means.
ill humor an unpleasant or irritable mood; disagreeableness.
illiberal lacking tolerance; bigoted.
illicit not permitted by custom or law; illegitimate.
illimitable not subject to limits; limitless.
Illinois a Midwestern U.S. state west of Indiana. (abbr.: IL) [3 definitions]
illiteracy the condition of being unable to read and write. [3 definitions]
illiterate unable to read or write. [5 definitions]
ill-mannered showing bad manners; impolite.
ill nature a disagreeable or spiteful disposition.
ill-natured showing a disagreeable temperament; bad-tempered; nasty.
illness the state or condition of being ill; sickness. [2 definitions]
illogic the state or quality of lacking logic; illogicality.
illogical not logical; contrary to reason or the rules of logic.
ill-omened preceded by bad omens.
ill-spent not spent or used to good purpose; wasted.
ill-starred unlucky; ill-fated.
ill-timed done or happening at a wrong or inappropriate time; inopportune.
ill-treat to treat poorly; mistreat.
illuminance the intensity of light per unit of area on a surface exposed to light; illumination.
illuminant anything that illuminates or sheds light.