Verified Answer :

‘Kenning’
is a metaphor for Anglo-Saxon Beowulf which means to elevate and beautify the
language of the text. Therefore kenning
war-masks refers to Beowulf. There are many instances that
personifications and metaphor are used for Beowulf. E.g. Mouth- word-treasure (Chapter V, line 2).

Hagrid

The kenning war – masks refer to
the society whose livelihood is in the battlefield and the sea as were the
mundane activities are held. The kennings presented with symbolisms are the
spear din (represents the battle), bone crusher (Grendel), sea and whale road
(ocean).