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 combustion is "act of burning.", the definition for facade is "false or superficial appearance.", and the definition for supple is "Flexible."

The definition for egotist is "Self–important person." Used in a sentence: Darren dreaded carpooling with the egotist Shelly, who talked about herself nonstop. The definition for abate is "become less in amount or intensity.", the definition for archetypal is "Characteristic of the original model or perfect example.", and the definition for garish is "Offensively bright."

The definition for methodical is "Performed in an orderly manner." Used in a sentence: Oscar's methodical approach exasperated his free–spirited friend Ben. The definition for redouble is "to make twice as great.", the definition for ramble is "To wander, physically or in language.", and the definition for incidental is "Minor."

The definition for iridescent is "Having a lustrous or attractivve quality." Used in a sentence: The movie star's iridescent presence charmed even the hardened reporter. The definition for colossal is "immense, enormous.", the definition for diffident is "Lacking self–confidence.", and the definition for heed is "To pay attention to."

The definition for opportune is "Suitable or convenient." Used in a sentence: Quan stepped onto the platform at the most opportune time, just as the train pulled in. The definition for sociable is "inclined to seek companionship.", the definition for exasperation is "The state of being irritated.", and the definition for perception is "Capacity for seeing or understanding."