To raise up or elevate something thoroughly, or to praise something extravagantly.
From 'be-' plus 'raise,' from Old Norse 'reisa' meaning to lift. In Middle English, this combination could mean both literal elevation and figurative exaltation.
Words with 'raise' often shift meaning between physical lifting and emotional lifting (like 'raising someone's spirits'), and 'betraise' captures both senses in one dense, old-fashioned word.
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