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 straddle is "to favor opposing sides.", the definition for trove is "Valuable collection.", and the definition for stealth is "The act of moving secretly or unnoticed."

The definition for eloquent is "Fluent, expressive." Used in a sentence: Kim, an eloquent speaker, was the best choice to make the presentation for the group. The definition for naive is "lacking worldy wisdom.", the definition for incumbent is "Necessary as a duty or responsibility.", and the definition for archetypal is "Characteristic of the original model or perfect example."

The definition for intricate is "Having complex and interrelated parts." Used in a sentence: The intricate poem baffled most readers with its numerous obscure metaphors. The definition for extant is "currently existing.", the definition for extol is "To praise highly.", and the definition for gruff is "Rough or stern in manner or speech."

The definition for avian is "Relating to birds." Used in a sentence: The old man affectionately referred to pigeons as his "avian friends." The definition for immoderate is "beyond usual or proper limits.", the definition for flaw is "An imperfection.", and the definition for unscrupulous is "Lacking principles."

The definition for authoritarian is "Favoring absolute obedience to authority." Used in a sentence: Marco's authoritarian mother never allowed him to watch more than one hour of television a day. The definition for comprehensible is "understandable.", the definition for polarize is "To break up into opposing groups.", and the definition for cunning is "Showing clever insight."