The antonyms for the word "feeble mindednesses" are strong-mindedness, intelligence, sharpness, cleverness, acuity, and brilliance. These antonyms represent the opposite of feeble-mindedness and suggest qualities such as mental fortitude, intellectual capacity, and mental agility. Individuals who possess these attributes tend to be productive and successful in their personal and professional lives. Whereas, feeble-mindedness is characterized by slow cognitive abilities and often leads to challenges in learning, decision-making, and problem-solving. Therefore, it is essential to note that a feeble-minded individual can work towards developing their intellectual capacity by embracing one or more of these antonyms.