The definition for parity is "Equality." Used in a sentence: Hilda, to avoid squabbles, aimed for parity in the slices of birthday cake. The definition for retroactive is "effective as of a prior time or condition.", the definition for raucous is "Noisy, rowdy.", and the definition for exasperation is "The state of being irritated."

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 egotist is "self–important person.", the definition for elusive is "Hard to grasp.", and the definition for preclude is "To rule out in advance."

The definition for polarize is "To break up into opposing groups." Used in a sentence: Thelma tended to polarize discussions rather than to encourage compromise. The definition for extol is "to praise highly.", the definition for promote is "To contribute to the growth or prosperity of.", and the definition for methodical is "Performed in an orderly manner."

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 prominence is "importance.", the definition for salvage is "To save from ruin.", and the definition for pretentious is "Making unjustified claims."

The definition for recrimination is "A retaliatory accusation." Used in a sentence: Frank, who was wounded by Sally's remark, made a bitter recrimination. The definition for flaunt is "to display showily.", the definition for periodic is "Occurring at regular intervals.", and the definition for clarity is "Clearness."