sturdiness

nouns

the state of being vigorous and robust
is derived from
is a type of (narrower)
the state of being vigorous and free from bodily or mental disease
the property of something that is strongly built
is derived from
is a type of (narrower)
the property of being physically or mentally strong
"fatigue sapped his strength"
resoluteness evidenced by strength of character
"sturdiness of moral principle"
is derived from
is a type of (narrower)
the trait of being resolute
"his resoluteness carried him through the battle"; "it was his unshakeable resolution to finish the work"