mainpernable Definition

A surety who is bound to pay a fine or forfeit if a principal does not perform a promise or obligation, and who is by law subject to the same penalties and forfeitures as the principal. In common law, a mainpernable is someone who is responsible for the principal's actions and is liable for any legal penalties that arise if the principal does not comply with their obligations. The term is now largely historical and appears in legal contexts related to the felony or bond suretyship.