The term "most hoydenish" refers to someone who is wild, boisterous, or unruly. The antonyms for "most hoydenish" are adjectives that describe someone who is calm, composed, and well-behaved. Some of the antonyms for "most hoydenish" include reserved, demure, gentle, mild, polite, and refined. Such words are often used to describe people who are polite and well-mannered in social settings, and who are not prone to loud, attention-seeking behavior. The opposite of a hoydenish person would be someone who is restrained, modest, composed, and refined in their behavior, manners, and speech. In summary, the antonyms for "most hoydenish" suggests an individual who is the opposite of wild and unruly.