To provide with a moat or surround with a moat; to isolate by creating barriers.
From 'be-' (prefix meaning to furnish with or cover with) + 'moat' (from Old French 'mote', possibly from Latin 'mota', meaning a mound or embankment). The word combines to mean 'to furnish with a moat'.
Medieval fortifications were so important that English actually created a verb meaning 'to surround with a moat'—this shows how language reflects what a culture considers essential. Castles were serious business!
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