The opposite of "de-values" is "appreciates". Appreciation refers to the increase in the value of something over time. Antonyms for devaluating include enhancing, improving, increasing, and inflating. When something appreciates, its value increases naturally and is often used interchangeably with appreciation. Appreciation is the opposite of devaluation, which occurs when the value of something falls. Instead of devaluating, one may work on its promotion or restoration to keep up with its value. Therefore, one should aim to prevent devaluation of property or assets by taking proactive steps to ensure appreciation over time.