frankpledge

Short definition from Wiktionary

Noun

1. 1
   A form of collective suretyship and punishment under English law among the members of a tithing.
2. 2
   Any group so similarly answerable for the conduct of all its members and liable for collective punishment.
3. 3
   A decener: a member of a tithing bound in frankpledge.
4. 4
   The tithing itself.