The word "weakhearted" refers to a person who lacks courage, determination, or conviction. The antonyms for the word "weakhearted" are "brave," "courageous," "strong-willed," "resolute," "determined," "fearless," "undaunted," "valiant," "gallant," and "intrepid." These words describe a person who is not easily discouraged, who faces challenges with confidence, who stands up for their beliefs, and who is willing to take risks. These qualities are essential for success in life, as they allow individuals to pursue their goals, overcome obstacles, and make a difference in the world. By embodying these antonyms of "weakhearted," one can develop the courage and resilience needed to face life's challenges with strength and determination.