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 benefactor is "one who offers financial help.", the definition for hedonism is "Belief that pleasure is the sole aim of life.", and the definition for periodic is "Occurring at regular intervals."

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 raspy is "rough, grating.", the definition for incidental is "Minor.", and the definition for onset is "Beginning."

The definition for melodious is "Having a pleasing melody." Used in a sentence: The melodious sounds of the symphony soothed Tim after his trying day. The definition for distortion is "the act of twisting out of shape.", the definition for antidote is "Something that relieves or counteracts.", and the definition for diffident is "Lacking self–confidence."

The definition for pretentious is "Making unjustified claims." Used in a sentence: The pretentious boy said that he was the fastest runner, but he finished last in the race. The definition for catastrophic is "relating to extreme misfortune.", the definition for polarize is "To break up into opposing groups.", and the definition for dubious is "Questionable."

The definition for pallid is "Lacking color." Used in a sentence: The nurse was worried by the patient's pallid face and shallow breathing. The definition for proximity is "closeness.", the definition for sociable is "Inclined to seek companionship.", and the definition for induce is "To influence or cause."