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 onset is "beginning.", the definition for supple is "Flexible.", and the definition for catastrophic is "Relating to extreme misfortune."

The definition for combustion is "Act of burning." Used in a sentence: Campers must use fire with great caution to prevent combustion of the parched brush. The definition for egotist is "self–important person.", the definition for benevolent is "Kind, helpful.", and the definition for sociable is "Inclined to seek companionship."

The definition for melodious is "Having a pleasing melody." Used in a sentence: The melodious sounds of the symphony soothed Tim after his trying day. The definition for demeanor is "behavior towards others.", the definition for induce is "To influence or cause.", and the definition for corrective is "Intended to correct."

The definition for exasperation is "The state of being irritated." Used in a sentence: The longer Jorge waited in line at the ticket counter, the more his exasperation grew. The definition for regale is "to amuse.", the definition for catastrophic is "Relating to extreme misfortune.", and the definition for inauspicious is "Not favorable."

The definition for onset is "Beginning." Used in a sentence: Crocuses bloom at the onset of spring, sometimes even before the snow melts. The definition for extant is "currently existing.", the definition for pretentious is "Making unjustified claims.", and the definition for refurbish is "To brighten or freshen."