The word un-hurtful implies that something is not harmful or damaging. Its antonym would be hurtful, which means that something is causing pain, damage, or injury. Other antonyms for un-hurtful include harmful, destructive, injurious, detrimental, and nocuous. When used in the context of relationships, antonyms for un-hurtful could include abusive, cruel, vindictive, and malicious. In general, the antonyms for un-hurtful describe actions or behaviors that are intended or accidental in causing pain, harm, or damage to others. It is important to be mindful of our actions and words to ensure that they are un-hurtful and do not cause any negative consequences.