Toughness - Definition
toughness
n 1: enduring strength and energy [syn: stamina, staying
power, toughness]
2: the property of being big and strong [syn: huskiness,
ruggedness, toughness]
3: the elasticity and hardness of a metal object; its ability to
absorb considerable energy before cracking [syn: temper,
toughness]
4: impressive difficulty [syn: formidability, toughness]