Unwholesome refers to something that is harmful, unhealthy or undesirable. The antonyms for this word could include terms like healthful, wholesome, beneficial, nourishing, pure, and nutritious. Healthful refers to something that is conducive to good health, while wholesome signifies something that is good for the body and mind. Beneficial and nourishing convey the idea of promoting health and growth, while pure suggests cleanliness and free from contaminants. Lastly, nutritious pertains to something that provides essential nutrients that the body needs. By using these antonyms, you can describe things that are good for you and beneficial to your well-being.