The word "uninjurious" means not likely to cause harm or damage. So, some antonyms for this word might include harmful, damaging, dangerous, hazardous, risky, unsafe, and injurious. These words describe things that are likely to cause harm or danger, whether to people, animals, or property. Antonyms for uninjurious might also include words like deleterious, detrimental, noxious, and poisonous, which suggest substances or situations that can be toxic, harmful, or even deadly. By knowing the antonyms for uninjurious, you can better understand the possible dangers and risks associated with certain activities, substances, or environments.