Origin: Germanic Old English suffix
Gentleness has 3 different meanings across 1 category:
the property possessed by a slope that is very gradual
acting in a manner that is gentle and mild and even-tempered
"his fingers have learned gentleness"
"suddenly her gigantic power melted into softness for the baby"
"even in the pulpit there are moments when mildness of manner is not enough"
The state of being gentle.