COMITATUS
The term means agreement between lord and warrior. The lord gives
shelter, food and gold; in return the warriors provide protection
for their lord. In Beowulf, only Beowulf and Wiglaf, as
warriors follow the comitatus rule. They both defend their
lord, even when their life is in danger.
BOAST
Boast is to pledge with honor. Throughout the poem, Beowulf boasts
before he fights the monsters.
THANE
A thane is a warrior-retainer. Who serves his lord in a
battle and is loyal to his lord. For this service, the lord or
the ruler will provide for his thanes with food and shelter as well
as with gifts and wealth.
FATE
Fate is a Christian belief that means every action which
happens to men, their birth or death, is already predetermined by God.
Therefore, men have no control over when, where, and how they
will be born or die. "Fate often saves the undoomed man
when his courage is good" is a saying of Beowulf. He says
this early in the poem when he describes his swimming contest
with Breca.