toughness

Mane (Îngilîzî)

1. (countable, uncountable) The state of being tough.
2. (countable, uncountable) The state of being tough.
3. (countable, uncountable) A formidable difficulty.

Hevwate

hardness

strength

stamina

tenacity

firmness

endurance

vigour

ruggedness

staying power

difficulty

hardiness

robustness

solidity

inclemency

spirit

cruelty

liveliness

force

stir

activity

formidability

durability

dynamism

sturdiness

temper

gusto

crustiness

relentlessness

huskiness

zest

state

stayer

stiffness

stoniness

strenuousness

strongness

stubbornness

tempering

tenaciousnes

tenaciousness

street smart

viscosity

wiriness

worldly wise

adamance

ropiness

unsusceptibility

knowledge of the world

doughtiness

perdurability

Werger

Zähigkeit

Härte

dureza

endurance

sterkte

tenacidad

resistencia

σκληρότητα

Stärke

vigueur

difficulté

Gewalt

force

Festigkeit

tremp

Etîmolojî (Îngilîzî)

Ji Middle English mîras hatiye girtin: toughnesse

In summary

From Middle English toughnesse, towghnesse, towghenesse, equivalent to tough + -ness.