Word Network: 有用な

Being useful, beneficial, or profitable. It describes something that brings a positive effect or helps in achieving a goal.

Useful, helpful; able to be used for a practical purpose.

Katsuyou refers to the practical or effective application of a resource, skill, or piece of information to achieve a goal. In a linguistic context, it specifically describes the conjugation or inflection of verbs and adjectives to change their grammatical function.