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 deferment is "the act of delaying.", the definition for appalling is "Inspiring dismay or disgust.", and the definition for ethical is "Conforming to accepted standards."

The definition for onset is "Beginning." Used in a sentence: Crocuses bloom at the onset of spring, sometimes even before the snow melts. The definition for fickle is "lacking constancy, changeable.", the definition for manifest is "Obvious.", and the definition for periodic is "Occurring at regular intervals."

The definition for condone is "To treat as acceptable." Used in a sentence: Crystal condoned her friend's late arrival because she found it hard to be on time herself. The definition for disdain is "feeling of contempt.", the definition for interminable is "Never ending, or seemingly endless.", and the definition for embellish is "To decorate."

The definition for salvage is "To save from ruin." Used in a sentence: After the fire, Mrs. Han tried to salvage her family photos from the wreckage. The definition for induce is "to influence or cause.", the definition for buffer is "Protective barrier.", and the definition for surplus is "Excess."

The definition for retroactive is "effective as of a prior time or condition." Used in a sentence: The retroactive law made even past infractions punishable. The definition for stealth is "the act of moving secretly or unnoticed.", the definition for rail is "To scold in harsh language.", and the definition for regurgitate is "To pour out or throw back."