An archaic or dialectal verb meaning to make blithe or to become blithe; to gladden or cheer up.
Formed from 'blithe' plus the verb-forming suffix '-en,' similar to how 'darken' comes from 'dark.' This suffix was very productive in Old English but has become less common in modern English.
The '-en' suffix (as in 'darken,' 'frighten,' 'quicken') comes from Old Germanic languages and shows how English used to be much more flexible about turning any adjective into a verb!
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