Incentive

Webster's Dictionary of the English Language

·adj Serving to kindle or set on fire.

II. Incentive ·adj Inciting; encouraging or moving; rousing to action; stimulative.

III. Incentive ·noun That which moves or influences the mind, or operates on the passions; that which incites, or has a tendency to incite, to determination or action; that which prompts to good or ill; motive; spur; as, the love of money, and the desire of promotion, are two powerful incentives to action.