firmness

noun

1
the quality of being steady or securely and immovably fixed in place
2
the trait of being resolute
his resoluteness carried him through the battle
it was his unshakeable resolution to finish the work
3
the property of being unyielding to the touch
4
the muscle tone of healthy tissue
his muscular firmness

Also useful for “firmness”:Unscrambler— Rearrange the letters in “firmness”