Impavid is an adjective that describes someone who is fearless, courageous, and bold in the face of danger. Antonyms for this word would include timid, fearful, cowardly, and meek. A timid person lacks the confidence and boldness to face danger, while a cowardly person is easily scared and prone to running away from danger. On the other hand, a meek person is mild and submissive and unlikely to take bold actions in the face of danger. In contrast, a person who is impavid is daring and unflinching, never backing down from a challenge, no matter how daunting it may seem.