1.
ease of use; usability; handiness
How easy or convenient something is to use. Refers to the practical experience of using a tool, product, or system. Can be either positive or negative.
A compound of 使い (using, from 使う) and 勝手 (convenience, one's own way). The 勝手 becomes がって due to rendaku (sequential voicing).
Almost always used with がいい (easy to use) or が悪い (hard to use). A practical, everyday word for evaluating products, tools, and interfaces.
Similar words
- 操作性 is more technical (operability)
- 利便性 is more formal (convenience)
- 使いやすさ is a simpler way to say 'ease of use'