frankpledge

noun4

1. •
   (historical) A form of collective suretyship and punishment under English law among the members of a tithing.
2. •
   Any group so similarly answerable for the conduct of all its members and liable for collective punishment.

   • The servants of the Crown were not, as now, bound in frankpledge for each other. — 1855
3. •
   (historical) The tithing itself.
4. •
   (historical) A decener: a member of a tithing bound in frankpledge.

   • Entire vills sir Henry Spelman conjectures to have consisted of ten freemen, or frank-pledges. — 1765