An archaic or rare term possibly meaning very strong, tough, or firm; of unclear modern usage.
Possibly a compound from 'harsh' or 'hart' (archaic/dialectal) plus 'strong,' but the word is so archaic that scholars are uncertain of its original formation and meaning.
This might be an old way of saying 'really tough' or 'very strong,' but it's vanished from English so completely that even scholars aren't sure—it's a linguistic ghost!
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