The word "ultra masculine" typically refers to qualities or behaviors that are considered stereotypically masculine, such as aggression, dominance, and physical strength. The antonyms of this phrase would be more aligned with traits typically associated with femininity, such as sensitivity, empathy, and nurturing. Other antonyms for ultra-masculine might include passive, gentle, or soft-spoken. Additionally, characteristics such as vulnerability, emotional openness, and inclusivity could be considered antonyms, as they are qualities that are often associated with a more balanced, non-binary approach to gender identities and roles. Ultimately, the antonyms for ultra-masculine are diverse and varied, reflecting the many ways in which gender and identity can be expressed and experienced.