The word "undiseased" refers to something that is free from any disease. Antonyms are words with opposite meanings. Some antonyms for "undiseased" are diseased, infected, ailing, ill, sickly, unwell, unhealthy, and morbid. The presence of any of these conditions or symptoms indicates a state opposite of being undiseased. For example, if someone is suffering from the flu or a cold, they would not be considered undiseased. Similarly, if an animal has a wound that is infected, it would not be categorized as undiseased. Knowing antonyms for "undiseased" can help in communicating about the health status of a person, animal, or object.