De-flower is a term used to describe the process of taking someone's virginity. In order to understand its antonyms, we need to consider words that are related to this concept. For instance, preserving one's virginity could be seen as an antonym to de-flowering. Other antonyms might include abstinence, chastity, celibacy, purity, and virginity intact. These words all refer to the idea of maintaining one's sexual purity either voluntarily or as a result of never having engaged in sexual activity. Therefore, if you want to express the opposite of de-flowering in language, you could use one or more of these terms, depending on the context.