The word "inobnoxious" means to be harmless, pleasant, and not causing offense. Its antonyms include unpleasant, harmful, offensive, obnoxious, and noxious. Unpleasant refers to something that is not agreeable or comforting, and may cause discomfort. Harmful refers to something that causes hurt, damage, or injury. Offensive refers to something that causes anger, annoyance, or resentment. Obnoxious refers to something that is extremely annoying or offensive to the senses. Noxious denotes a harmful or poisonous substance that causes injury or damage to living organisms. These antonyms highlight the opposite meaning of inobnoxious, and emphasize the importance of using appropriate language in communication.