From Arabic 'amir al-' (commander of) — the 'd' was inserted by scribes who wrongly linked it to Latin 'admirari.'
A high-ranking commander in a navy, typically ranking above a vice admiral and below an admiral of the fleet.
From Old French 'amiral,' from Medieval Latin 'admirallus,' a corruption of Arabic 'amīr al-' (أمير ال, 'commander of the'), typically from the phrase 'amīr al-baḥr' (أمير البحر, 'commander of the sea'). The intrusive 'd' in the English form arose from false association with Latin 'admirari' (to admire). The title entered European languages during the Crusades and through contact with the naval commands of the Fatimid and other Muslim Mediterranean powers