The word "shallownesses" refers to the lack of depth or superficiality. Its antonyms would denote the opposite, such as profundity, depth, and insightfulness. These words describe the substance and complexity of a subject or individual. Profundity refers to the intellectual depth and wisdom of an idea or person, while depth implies the intensity and complexity of something. Insightfulness denotes the ability to understand a situation or person deeply, and to see beyond the surface. The antonyms of "shallownesses" suggest a deeper and more meaningful understanding, offering a richer and more profound perspective.