In a way that produces advantage or benefit; favorably or to good effect.
From 'advantageous' (from 'advantage') plus the suffix '-ly.' The adverbial form describing how something is done in an advantageous manner.
When someone says they're 'positioned advantageously,' they're using fancy language to avoid saying 'we got lucky' or 'we rigged the system'—the adverb version adds a layer of eloquence to advantage.
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