The definition for illuminate is "To make clear." Used in a sentence: Her excellent lecture illuminated the complicated subject of nuclear physics. The definition for dubious is "questionable.", the definition for retroactive is "effective as of a prior time or condition.", and the definition for disdain is "Feeling of contempt."

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 inflammatory is "tending to excite anger.", the definition for duplicity is "Deceptive thought, speech, or action.", and the definition for combative is "Eager to fight."

The definition for raucous is "Noisy, rowdy." Used in a sentence: Serena, who preferred quiet conversation, left the rancous party. The definition for heed is "to pay attention to.", the definition for diffident is "Lacking self–confidence.", and the definition for flourish is "To make bold, sweeping gestures."

The definition for censure is "To find fault with." Used in a sentence: The critical teacher was quick to censure her students for even small mistakes. The definition for flaw is "an imperfection.", the definition for catastrophic is "Relating to extreme misfortune.", and the definition for hedonism is "Belief that pleasure is the sole aim of life."

The definition for compulsion is "An irresistible impulse." Used in a sentence: Tamar, a shoe fanatic, could not resist the compulsion to buy the shiny red boots. The definition for clairvoyance is "ability to see things beyond ordinary perception.", the definition for prune is "To reduce by removing excess.", and the definition for composed is "Calm."