The definition for gargantuan is "Gigantic." Used in a sentence: The gargantuan monster towered over the ten–story bulding. The definition for mandate is "an official order or commission to do something.", the definition for iridescent is "Having a lustrous or attractivve quality.", and the definition for prominence is "Importance."

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 manifest is "obvious.", the definition for extenuating is "Partially excusing.", and the definition for lurid is "Causing horror, shocking."

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 onset is "beginning.", the definition for pomp is "Showy display.", and the definition for aerate is "To supply with air."

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 liability is "a person or thing whose presence or behavior is likely to cause embarrassment or put one at a disadvantage.", the definition for iridescent is "Having a lustrous or attractivve quality.", and the definition for scamper is "To run quickly."

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 rehash is "to discuss again.", the definition for epistolary is "Contained or carried on in letters.", and the definition for opportune is "Suitable or convenient."