A archaic or rare compound term referring to something with both hair and beard characteristics, or used descriptively in old texts.
Compound of 'hair' (Old English 'hǽr') and 'beard' (Old English 'beard'). This appears to be a very rare or possibly dialectal formation from older English.
Some compound words were invented centuries ago but never stuck around—'hairbeard' is probably one that sounded logical at the time but lost out to simpler descriptions.
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