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 fraud is "trick.", the definition for melee is "A tumultuous fight among several people.", and the definition for elate is "To fill with joy."

The definition for retroactive is "effective as of a prior time or condition." Used in a sentence: The retroactive law made even past infractions punishable. The definition for sociable is "inclined to seek companionship.", the definition for raucous is "Noisy, rowdy.", and the definition for liability is "A person or thing whose presence or behavior is likely to cause embarrassment or put one at a disadvantage."

The definition for perception is "Capacity for seeing or understanding." Used in a sentence: His incredible perception made him the best detective on the force. The definition for promote is "to contribute to the growth or prosperity of.", the definition for precept is "A general rule of action.", and the definition for flaunt is "To display showily."

The definition for flagrant is "Noticeably offensive." Used in a sentence: The executive was fired for his flagrant abuse of the company expense account. The definition for parity is "equality.", the definition for insolence is "Boldness or rudeness.", and the definition for demean is "To lower status."

The definition for turpitude is "Essential baseness, depravity." Used in a sentence: The turpitude of the villain in the movie offended most audiences. The definition for pantomime is "telling a story through gestures.", the definition for parity is "Equality.", and the definition for commemorate is "To mark by a ceremony."