The definition for placebo is "An inactive substance used in medical testing." Used in a sentence: Tom, who had taken the placebo, found that his allergy symptoms did not go away. The definition for facade is "false or superficial appearance.", the definition for augment is "To make greater.", and the definition for turpitude is "Essential baseness, depravity."

The definition for regurgitate is "To pour out or throw back." Used in a sentence: The teacher wanted us to examine ideas rather than to regurgitate memorized facts. The definition for futile is "without purpose, completely ineffective.", the definition for manifest is "Obvious.", and the definition for periodic is "Occurring at regular intervals."

The definition for ethical is "Conforming to accepted standards." Used in a sentence: Mary did the ethical thing and turned in the diamond necklace she found. The definition for mandate is "an official order or commission to do something.", the definition for drub is "To defeat decisively.", and the definition for derelict is "Abandoned."

The definition for untenable is "Not able to be defended." Used in a sentence: Rashid made the untenable statement that George Washington was the second president of the United States. The definition for heinous is "shockingly evil.", the definition for oblivious is "Lacking awareness.", and the definition for epitaph is "Brief statement honoring a dead person."

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 parity is "equality.", the definition for repel is "To resist, reject.", and the definition for gravity is "Importance, significance."