Endurance
Endurance is the ability of an organism to exert itself and remain active for a long period of time, as well as its ability to resist, withstand, recover from and have immunity to trauma, wounds, or fatigue.
Read on WikipediaGrey stone worn smooth, steadfast and unchanged.
Enduring is a cool grey, close to blue.
It can be described as cool, muted, greyish and dusty.
Set in white, because white reads best on it.
Endurance is the ability of an organism to exert itself and remain active for a long period of time, as well as its ability to resist, withstand, recover from and have immunity to trauma, wounds, or fatigue.
Read on WikipediaAdjective
Verb