The definition for negate is "To make invalid." Used in a sentence: Paula negated Tiffany's argument by proving that her main premise was false. The definition for corroborate is "to support with evidence.", the definition for implausible is "Unbelievable.", and the definition for revive is "To bring back to life."

The definition for insolence is "Boldness or rudeness." Used in a sentence: The boy's insolence to the policeman embarrassed his mother. The definition for extenuating is "partially excusing.", the definition for gravity is "Importance, significance.", and the definition for punctual is "On time."

The definition for condone is "To treat as acceptable." Used in a sentence: Crystal condoned her friend's late arrival because she found it hard to be on time herself. The definition for flaunt is "to display showily.", the definition for serenity is "Calmness.", and the definition for scamper is "To run quickly."

The definition for duplicity is "Deceptive thought, speech, or action." Used in a sentence: The life of an undercover detective is filed with necessary duplicity. The definition for fickle is "lacking constancy, changeable.", the definition for buffoonery is "Foolish behavior.", and the definition for negate is "To make invalid."

The definition for catastrophic is "Relating to extreme misfortune." Used in a sentence: The effects of the massive hurricane were catastrophic. The definition for foil is "one that enhances or underscores by contrast.", the definition for induce is "To influence or cause.", and the definition for mundane is "Practical, ordinary."