To make broad or broader; to widen or expand something in scope or physical width.
From 'em-' (to make or cause to be) plus 'broaden' (to make broad), from Old English 'brad' (broad). This follows the standard pattern of causative verbs.
Languages naturally embroaden their vocabulary—what starts as slang eventually becomes standard, and what was once a narrow technical term becomes common, showing how language expands like living organisms.
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