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