可し
1
auxiliary · 'ku' adjective (archaic)
must;should;ought to
See also:
可き (べき)
各会員は会費を払うべし。
Each member has to pay a membership fee.
2
auxiliary adjective · 'ku' adjective (archaic)
will (surely);be bound to;must
3
auxiliary · 'ku' adjective (archaic)
will (do);shall
indicates volition