A ruler, commander, or nobleman in Muslim countries, often used as a title for a prince or leader.
From Arabic 'amīr' meaning 'commander' or 'leader,' from a root meaning 'to command.' It's closely related to the word 'admiral,' which comes from the same Arabic origin through different languages.
The word 'amir' is actually hiding in plain sight in English—'admiral' comes from Arabic 'amir al-bahr' (commander of the sea)! When Europeans encountered Muslim naval leaders, they borrowed both the concept and the word, and it evolved into what we call 'admiral' today.
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