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Japanese

くす

さいぜんをつくす
Meaning: to do one’s best; to do everything possible
Part of Speech: Verb, Expression

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Verb inflections

Form Affirmative Negative
Present 最善を尽くす 最善を尽くさない
Polite 最善を尽くします 最善を尽くしません
Past 最善を尽くした 最善を尽くさなかった
Polite + Past 最善を尽くしました 最善を尽くしませんでした
Te-form 最善を尽くして 最善を尽くさなくて
Potential 最善を尽くせる 最善を尽くせない
Passive 最善を尽くされる 最善を尽くされない
Causative 最善を尽くさせる 最善を尽くさせない
Imperative 最善を尽くせ 最善を尽くすな

Example

医師は最後まで最善を尽くした。
The doctor did everything possible until the very end.

Usage Notes

This fixed expression emphasizes making every reasonable effort to achieve an outcome. It is common in serious, professional, and encouraging contexts.

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