reverser

the proprietor of lands which had been granted by him to another as security for the repayment of a debt, under a redeemable right; he therefore had the right, when the debt was repaid, to resume possession of the lands from the lender, who was called the wadsetter, the deed by which all this was done being the wadset.  The reverser would need letters of regress from his superior undertaking to accept him again as feuar (vassal) when the lands were restored.