If you say that someone's comments or actions are hurtful, you mean that they are unkind and upsetting. Her comments can only be hurtful to Mrs Green's family. = upsetting. making you feel very upset or offended = unkind hurtful remark/comment etc
Tending to impair or damage; injurious; mischievous; occasioning loss or injury; causing pain or suffering
Tending to impair or damage; injurious; mischievous; occasioning loss or injury; as, hurtful words or conduct