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 preclude is "to rule out in advance.", the definition for penurious is "Extrememly stingy.", and the definition for flourish is "To make bold, sweeping gestures."

The definition for foil is "One that enhances or underscores by contrast." Used in a sentence: The sweet cookie was a perfect foil to the sour lemon sorbet. The definition for onset is "beginning.", the definition for buffer is "Protective barrier.", and the definition for futile is "Without purpose, completely ineffective."

The definition for aerate is "To supply with air." Used in a sentence: Every spring, Soloman used his tiller to aerate the compact soil. The definition for stifle is "to repress or discourage.", the definition for authoritarian is "Favoring absolute obedience to authority.", and the definition for incongruous is "Not harmonious, incompatible."

The definition for benevolent is "Kind, helpful." Used in a sentence: Sherman revealed his benevolent side when he offered to help Carter with his homework. The definition for gruff is "rough or stern in manner or speech.", the definition for antidote is "Something that relieves or counteracts.", and the definition for incidental is "Minor."

The definition for accessible is "Easy to reach or to approach." Used in a sentence: The introduction to the complex novel was, thankfully, written in clear accessible language. The definition for aesthete is "person having or affecting sensitivity to beauty.", the definition for naive is "Lacking worldy wisdom.", and the definition for pretense is "False intention or purpose."