1The team's toughness and determination were evident in their comeback victory against all odds.
2Is toughness a fixed trait, or can it be developed through experience and training?
3The new policy aims to increase the toughness of the regulatory framework by introducing stricter penalties for non-compliance.
4Researchers have been studying the toughness of various materials to develop more resilient infrastructure for extreme weather conditions.
5There is a growing recognition of the importance of emotional toughness in leadership, particularly in times of crisis or uncertainty.