A small borough or a diminutive administrative division within or subordinate to a larger borough.
From English 'borough' (from Old English 'burg', meaning fortified town) plus the diminutive suffix '-let' (small). A rare historical term for minor administrative subdivisions in English local government.
The '-let' suffix in English has a charming history—it made small things sound aristocratic and important; medieval administrators used it to make humble hamlets sound respectable in official documents.
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