"Loamiest" means earthy, fertile or rich in soil. The antonyms for "loamiest" are barren, arid and infertile. Barren refers to land that is incapable of sustaining plant growth, while arid means dry or lacking water. Infertile means not capable of producing crops or offspring. These words are usually used to describe land, but they can also be applied to a person's life or ideas. In nature, fertile land supports an abundance of plant and animal life, while barren land is devoid of life. Similarly, in life, one's ideas and beliefs can either be fertile, generating creativity and growth, or barren, stifling progress and development.