The expression "brave front" can be used to describe a person's attempt to conceal their fear or discomfort in a difficult situation. Other phrases with similar meanings include "stoic facade," "courageous demeanor," and "unwavering composure." "Brave face" is also a common synonym, suggesting that someone is putting on a mask of courage despite their inner emotions. Another option is "calm exterior," which emphasizes the outward appearance of tranquility even when the person is feeling anxious or apprehensive. No matter which phrase is used, the intent is the same: to convey strength and resolve in the face of adversity.