In a manner that is enviable; in a way that causes others to feel envy or wish they had the same thing.
From 'enviable' plus suffix '-ly' (in a manner of). Standard English adverb formation converting adjectives to describe how something is done or exists.
'She is enviably talented' or 'enviably wealthy'—this adverb is actually used regularly, unlike 'enviableness,' showing that some word forms catch on while others don't.
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