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 polarize is "to break up into opposing groups.", the definition for incongruous is "Not harmonious, incompatible.", and the definition for corrosive is "Bitingly sarcastic."

The definition for incumbent is "Necessary as a duty or responsibility." Used in a sentence: It was incumbent on Jack to attend his father's retirement party. The definition for comparable is "similar, equivalent.", the definition for archaic is "Characteristic of an earlier time.", and the definition for mediate is "To come between parties in order to reconcile."

The definition for incongruous is "Not harmonious, incompatible." Used in a sentence: Sadie's cowboy hat was incongruous with her black cocktail dress. The definition for placebo is "an inactive substance used in medical testing.", the definition for buffer is "Protective barrier.", and the definition for moderate is "Tending toward the average."

The definition for curtail is "To make less." Used in a sentence: Doreen decided to curtail her spending after she bounced a check. The definition for drab is "dull, monotonous.", the definition for accentuate is "To emphasize.", and the definition for supple is "Flexible."

The definition for stealth is "The act of moving secretly or unnoticed." Used in a sentence: The burglar took the ring by stealth, slipping it from the sleeping woman's finger. The definition for retroactive is "effective as of a prior time or condition.", the definition for incisive is "Impressively direct and decisive.", and the definition for prominence is "Importance."