The definition for illuminate is "To make clear." Used in a sentence: Her excellent lecture illuminated the complicated subject of nuclear physics. The definition for composed is "calm.", the definition for repel is "To resist, reject.", and the definition for flagrant is "Noticeably offensive."

The definition for avian is "Relating to birds." Used in a sentence: The old man affectionately referred to pigeons as his "avian friends." The definition for unscrupulous is "lacking principles.", the definition for impenitent is "Lacking remorse.", and the definition for retroactive is "effective as of a prior time or condition."

The definition for archaic is "Characteristic of an earlier time." Used in a sentence: In the world of high fashion, two–year–old shoes are considered positively archaic. The definition for placebo is "an inactive substance used in medical testing.", the definition for periodic is "Occurring at regular intervals.", and the definition for epitaph is "Brief statement honoring a dead person."

The definition for compulsion is "An irresistible impulse." Used in a sentence: Tamar, a shoe fanatic, could not resist the compulsion to buy the shiny red boots. The definition for raucous is "noisy, rowdy.", the definition for anthology is "A collection of selected literary pieces.", and the definition for punctual is "On time."

The definition for garish is "Offensively bright." Used in a sentence: The garish wallpaper offended Jerome, who preferred subtle colors. The definition for combustion is "act of burning.", the definition for demean is "To lower status.", and the definition for retroactive is "effective as of a prior time or condition."