The phrase "more vixenish" implies someone or something that is more cunning, seductive, or dangerous, resembling a fox. The opposite of vixenish could be docile, innocent, or demure. Other antonyms could be frumpy, plain, or boring. These words describe personalities or appearances that are unremarkable or don't stand out in a crowd. Additionally, the antonym for vixenish can be chaste, modest or inhibited, suggesting someone that is demure, controlled or one that does not take risks or place themselves in dangerous, seductive situations. The antonyms for vixenish emphasize the different personality traits that we associate with people by their attitude, action, and appearances.