To be on all sides of something or someone; to encircle completely.
From Old French 'suronder' meaning to overflow or go around, from Latin 'super' (over) and 'unda' (wave). The word originally implied flowing around like water before taking on its current spatial meaning.
The 'unda' root meaning wave is hiding in dozens of English words—'undulate,' 'redundant,' 'abundance'—all carrying that sense of flowing or waving movement underneath.
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