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 serenity is "calmness.", the definition for beneficial is "Helpful.", and the definition for flaw is "An imperfection."

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 corrosive is "bitingly sarcastic.", the definition for abate is "Become less in amount or intensity.", and the definition for pretentious is "Making unjustified claims."

The definition for pantomime is "Telling a story through gestures." Used in a sentence: The jealous actress called her understudy's performance a ridiculous pantomime. The definition for scapegoat is "someone who bears the blame for others.", the definition for curtail is "To make less.", and the definition for avian is "Relating to birds."

The definition for frugal is "Thrifty, cheap." Used in a sentence: The frugal shopper only bought items that were on sale. The definition for accentuate is "to emphasize.", the definition for ethical is "Conforming to accepted standards.", and the definition for elusive is "Hard to grasp."

The definition for revoke is "To cancel by taking back." Used in a sentence: After Kal's father revoked his allowance, he had no money for the movies. The definition for precept is "a general rule of action.", the definition for duplicity is "Deceptive thought, speech, or action.", and the definition for oblivious is "Lacking awareness."