An archaic or variant spelling of 'brisk'; quick and energetic, though this spelling is rarely used in modern English.
An alternative or archaic spelling of 'brisk,' possibly influenced by French 'brusque' (meaning abrupt or blunt), though the exact relationship between these words is debated by etymologists.
'Brisque' is a perfect example of how English spelling wasn't standardized until printing press technology made consistency economically important—before that, you'd see the same word spelled multiple ways in the same manuscript.
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