In a way that is very unusual, remarkable, or surprising; far beyond what is normal or expected.
From Latin 'extraordinarius' meaning 'outside the usual order,' combining 'extra-' (outside) and 'ordinarius' (orderly). The adverbial form '-ly' was added in English to describe how something happens in an exceptional manner.
This word literally means 'outside the ordinary'—and it's one of the longest common English adverbs! Medieval scholars loved using Latin prefixes like 'extra-' to describe things that defied normal categories, which is why so many scientific and formal words use it today.
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