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 appalling is "inspiring dismay or disgust.", the definition for regale is "To amuse.", and the definition for defiant is "Showing bold resistance."

The definition for catastrophic is "Relating to extreme misfortune." Used in a sentence: The effects of the massive hurricane were catastrophic. The definition for meticulous is "extrememly careful regarding details.", the definition for corroborate is "To support with evidence.", and the definition for parity is "Equality."

The definition for revive is "To bring back to life." Used in a sentence: Hank tried to revive Clare's interest in the project, but her enthusiasm had expired. The definition for untenable is "not able to be defended.", the definition for ploy is "A contrived plan.", and the definition for buffer is "Protective barrier."

The definition for incisive is "Impressively direct and decisive." Used in a sentence: Samir's incisive leadership made him the natural choice for president of the company. The definition for clarity is "clearness.", the definition for promote is "To contribute to the growth or prosperity of.", and the definition for scamper is "To run quickly."

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 raucous is "noisy, rowdy.", the definition for ploy is "A contrived plan.", and the definition for anthology is "A collection of selected literary pieces."