toughness
noun
[ ˈtʌfnəs ]
• the state of being strong enough to withstand adverse conditions or rough handling.
• "the toughness of steel"
• the ability to deal with hardship or to cope in difficult situations.
• "they showed great mental toughness to keep going"
• demonstration of a strict and uncompromising approach.
• "the toughness of the regime was legendary"
• the quality of being strong and prone to violence.
• "his reputation for toughness on the street"
