When looking for synonyms for "most unwomanly," there are many options available. The word "unfeminine" can be used to describe behaviors or traits that go against traditional gender expectations, while "masculine" might refer to behaviors that are typically associated with men. Other terms that could be used include "tomboyish," "boorish," or even "unladylike." These words all imply a deviation from established norms of femininity, and may be used to criticize behavior that is considered inappropriate for women. However, it is important to remember that gender roles are socially constructed, and that there is no one "right" way to express gender.