There are several synonyms for the phrase "steel yourself," which means to prepare oneself mentally or emotionally for a difficult or challenging situation. These synonyms include brace oneself, fortify oneself, toughen oneself up, prepare oneself, and ready oneself. Other similar phrases include "put on a brave face," "keep a stiff upper lip," and "grit your teeth." Whatever the phrase, the objective is to build mental and emotional resilience, enabling oneself to withstand stress, pressure, or adversity. It can be a helpful approach in facing challenging times, reminding oneself to persevere in the face of obstacles and adversity.