The opposite of becoming toughened is becoming weakened or softened. When something becomes weakened, it becomes less strong or effective. Softening, on the other hand, entails becoming more sensitive or gentle. In a physical sense, becoming toughened may refer to muscle mass building and endurance increasing. Its opposite, becoming weakened, would imply a decrease in those physical attributes. Similarly, in an emotional sense, toughening may refer to developing resilience and increasing one's ability to handle stress. Conversely, becoming softened may indicate heightened emotional sensitivity and reduced resistance to stressors. Ultimately, becoming toughened or weakened is a dynamic process that depends on individual disposition, circumstances, and personal choices.