The phrase "showing one's face" can be viewed as positive or negative depending on the context. An antonym for "showing one's face" could be hiding one's face, avoiding exposure or keeping a low profile. These antonyms imply a desire for privacy, anonymity, or even fear of judgment or confrontation. Conversely, antonyms could include being visible and present, engaging in social interaction, or being comfortable in one's own skin. Overall, the meaning of "showing one's face" is contingent on the individual, the circumstances, and the intent behind the action.