役立つ vs 有用
Japanese word comparison
Listen to 役立つ
Listen to 有用
| 役立つ | 有用 |
|---|---|
YAku-da-tsu verb | ゆうよう verb |
| to be useful; to be helpful | useful; of practical value |
How they differ
有用 is more formal and evaluative than 役立つ. It often describes things, information, or methods as having practical value, while 役立つ is a more general verb meaning that something actually helps or proves useful in a situation.
When to use each
When to use 役立つ: Use 役立つ when you want to say that something helps or is useful in a concrete situation.
When to use 有用: Use 有用 when you want a more formal way to say that something is valuable or useful in a practical sense.
Side-by-side examples
- この情報は試験勉強に役立つ。
(This information is helpful for exam study.) - この情報は試験勉強に有用だ。
(This information is useful for exam study.)
Register & nuance: 有用 is more formal and often used in writing, reports, or technical contexts, while 役立つ is common in everyday speech.