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 heinous is "shockingly evil.", the definition for archaic is "Characteristic of an earlier time.", and the definition for incongruous is "Not harmonious, incompatible."

The definition for impenitent is "Lacking remorse." Used in a sentence: The impenitent criminal received a harsh penalty, but his remorseful accomplice was released. The definition for naive is "lacking worldy wisdom.", the definition for dubious is "Questionable.", and the definition for derelict is "Abandoned."

The definition for heed is "To pay attention to." Used in a sentence: "Heed my advice," the fortuneteller warned Sebastian when he tried to ignore her prophecy. The definition for apathetic is "showing little or no emotion.", the definition for authoritarian is "Favoring absolute obedience to authority.", and the definition for elate is "To fill with joy."

The definition for rail is "To scold in harsh language." Used in a sentence: Clay began to cry as his irate manager railed at him for missing the deadline. The definition for augment is "to make greater.", the definition for elate is "To fill with joy.", and the definition for placebo is "An inactive substance used in medical testing."

The definition for colossal is "Immense, enormous." Used in a sentence: After pushing with all his might, Frank realized he could never move the colossal boulder. The definition for pallid is "lacking color.", the definition for inauspicious is "Not favorable.", and the definition for dubious is "Questionable."