operability; usability; user-friendliness
Refers to how easy or intuitive a device, software, or interface is to operate. Often used in technical and product contexts.
This app has good usability, and anyone can start using it right away.
We improved the UI to enhance operability.
Compound of 操作 (operation, manipulation) + 性 (nature, -ity). The exact historical derivation is uncertain, but the word follows a common pattern for forming abstract nouns from verbs.