The origin of the idiom "duty bound" can be traced back to Middle English and has been in use for several centuries. The phrase combines the word "duty," which has roots in Old French and Latin, and "bound," originating from Old English and Germanic languages. The concept of being bound or obligated to fulfill a duty is a fundamental aspect of human social and moral frameworks, and the phrase "duty bound" emerged as a concise way to express this idea. It is often employed in professional settings, such as military, law enforcement, or emergency services, where individuals have sworn oaths or taken on roles that require them to prioritize their duties above personal interests.

英語での「duty bound」の定義と意味

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