loyal: [16] Loyal, ultimately the same word as legal, has a double history in English. It was originally acquired in the 13th century as leal. This came from Anglo-Norman leal, a descendant of Latin lēgālis ‘legal’. Then in the 16th century it was reborrowed from the modern French form loyal. The semantic link is ‘faithfully carrying out (legal) obligations’. => legal[loyal etymology, loyal origin, 英语词源]