aptness
nounUK /ˈæpt.nəs/
US /ˈæpt.nəs/
Aptness is how good something is at doing its job.
The aptness of her answer surprised everyone.
OTHER MEANINGS
2. A natural ability to learn or do something well.
He showed an aptness for music at a young age.
3. The quality of being quick to understand.
Her aptness in class made her a favorite student.
4. The state of being right for a certain situation.
The aptness of the joke depended on who was listening.