not reluctant to; not unwilling to; willing to; eager to

💡 Nuance & Usage: A somewhat formal and polite expression meaning 'not unwilling to' or 'willing to (do something).' It implies a positive readiness or eagerness, often for something that might involve effort or sacrifice. 「喜んで〜する」「〜するのを惜しまない」という、やや硬い表現です。