The word "devaluing" refers to decreasing the value of something, but its antonyms refer to the opposite process. Words like "enhancing," "augmenting," "enriching," and "appreciating" indicate an increase in value. On the other hand, words like "undervaluing," "underestimating," and "depreciating" imply that something is worth more than is currently being acknowledged. The opposite of "devaluing" may also be expressed by words like "strengthening," "boosting," "elevating," or "improving." Regardless of the word used, the antonyms for "devaluing" all suggest an increase in value, worth, or importance.