Origin: Germanic Old English suffix
Kindness has 4 different meanings across 1 category:
the quality of being warmhearted and considerate and humane and sympathetic
"Her kindness was evident in the way she gently comforted every stranger who looked lost on the street."
tendency to be kind and forgiving
"Her natural kindness meant she always forgave her friends when they made mistakes."
The state of being kind.
"Her genuine kindness brought comfort to everyone in the room."
The word kindness comes from Middle English kyndenesse, which combined the root meaning of being gentle or natural with a suffix indicating a quality. It entered modern usage as an abstract noun describing the trait of being considerate and benevolent.