The word "unrelenting" refers to something that is persistent, unyielding, and uncompromising. Its antonyms, on the other hand, are words that signify the opposite meaning. One of the antonyms for unrelenting is "yielding," which means to give way, comply or agree. "Flexible "is another antonym that refers to something that is adaptable or pliable. "Compassionate" is another antonym that refers to someone who is empathetic, understanding and forgiving. Finally, "merciful" is another antonym that refers to being kind, forgiving and considerate. Understanding antonyms for unrelenting can help us to better communicate our intent when contrasting ideas.