Unbalanced, peculiarity:
this peculiarity, concerning the weapons, means the item is unbalanced, so can give more negative modifiers than usual, in some situations.
Undead, discipline:
this discipline contains the powers typical of those who are dead but still walking among the living.
Unpredictable, peculiarity:
this peculiarity, concerning the weapons, means that the object is flexible and very difficult to parry or block.
Unreliable, peculiarity:
this peculiarity, concerning the armors, means that the object is crudely constructed, therefore could protect little or nothing against well aimed attacks.