ETYMOLOGY
perhaps from coll (a fool, simpleton, dupe) + hardy,
though the dupe or simpleton is not exactly the type of the ‘hardy’ fool
EXAMPLE
“… Is this the profession of a Byshop? is this the Diuinitie of Osorius? Downe with that Pecockes tayle, away with this arrogancie: be no more so collhardy, and write hereafter more aduisedly, and take better regard to your penne, lest you bryng your name into odious contempt with all Christendome. …”
From: Against Ierome Osorius Byshopp of Siluane in Portingall and against his slaunderous inuectiues An aunswere apologeticall: for the necessary defence of the euangelicall doctrine and veritie,
By Walter Haddon and John Foxe
Translated by James Bell, 1581
Lexicophilia 