Unmaidenlike refers to behavior that is deemed inappropriate or unbecoming of a lady. Its antonyms would be words that describe behavior that is appropriate, graceful, and lady-like. Some antonyms for unmaidenlike include dainty, elegant, modest, refined, delicate, genteel, graceful, polite, and demure. These words describe women who conduct themselves with grace, politeness, and humility. In contrast, unmaidenlike behavior suggests a lack of refinement, tact, and grace. Choosing these antonyms would help to provide a clearer and more positive description of women who exhibit lady-like demeanor, which is still valued in many cultures.