The phrase "shows one's face" refers to the act of appearing in front of others, revealing oneself, or being present. The antonyms for this phrase could be "hides one's face," which implies concealing oneself from others, avoiding contact or attention. Other antonyms could be "absent," which means not being present physically, "disappears," which refers to vanishing without leaving any trace, or "withdraw," which denotes retreating or moving away from others. These antonyms imply a sense of isolation, distance, or disconnection from others. However, in some contexts, hiding one's face or withdrawing may also have positive connotations, such as protecting oneself from harm or preserving one's privacy.