"Unhurtful" is a word that denotes an action or event that does not cause any harm or injury to someone or something. Its opposite, "hurtful," describes actions, words or events that cause harm, injury, pain, or damage. Some antonyms for "unhurtful" include harmful, injurious, detrimental, destructive, and hurtful. When used in a sentence, "unhurtful" might indicate that no specific action was taken that could cause harm or injury, while its opposite "hurtful" might suggest that someone has been injured or hurt in some way, either intentionally or unintentionally. It is essential to understand the meaning and usage of antonyms to communicate effectively, and broaden your vocabulary.