fuzysi'u lujvo

x1 (set of individuals) are mutually accountable to each other for x2 (action/resulting state) and act as each other's judge/authority.

See fuzme, simxu

In notes:

selfu'esi'u
x1 (action/resulting state) is the agreed-upon commitment for which x2 (set of individuals) hold each other mutually accountable, acting as each other's judge/authority.