Morale

There are two kinds of morale: high morale and regular morale.  

Most beings are assumed to have regular morale.  Certain skills, spells, 
abilities, and magical items can increase morale, providing resistance
to the negative effects of panic and certain spells.

Conversely, there are certain horrible powers and spells that destroy
morale, removing the effect of high morale.  

See also: HELP PANIC