The definition for catastrophic is "Relating to extreme misfortune." Used in a sentence: The effects of the massive hurricane were catastrophic. The definition for trove is "valuable collection.", the definition for flourish is "To make bold, sweeping gestures.", and the definition for placebo is "An inactive substance used in medical testing."

The definition for unscrupulous is "Lacking principles." Used in a sentence: The unscrupulous salesman was fired for lying to his customers. The definition for serenity is "calmness.", the definition for avian is "Relating to birds.", and the definition for absolve is "To forgive; to free from guilt."

The definition for deferment is "The act of delaying." Used in a sentence: Sybil was frustrated by the deferment of her much anticipated vacation. The definition for raucous is "noisy, rowdy.", the definition for benefactor is "One who offers financial help.", and the definition for brandish is "To shake or wave menacingly."

The definition for elusive is "Hard to grasp." Used in a sentence: The words to the song are elusive, as the singer tends to mumble. The definition for compulsion is "an irresistible impulse.", the definition for ecstatic is "Overwhelmingly emotional.", and the definition for rail is "To scold in harsh language."

The definition for finite is "Having definite limits." Used in a sentence: The exasperated mother had finite patience for her toddler's tantrums. The definition for aerate is "to supply with air.", the definition for defiant is "Showing bold resistance.", and the definition for serenity is "Calmness."