Even the wheels of Cuchulain's chariot roar as they whirl into the fight.

This partial life given to the weapons of war is not specially Celtic.

Indeed, it is more common in Teutonic than in Celtic legend, and it seems probable that it was owing to the Norsemen that it was established in the Hero tales of Ireland.
This addition of life, or of some of the powers of life, to tree and well and boulder-stone, to river and lake and hill, and sword and spear, is common to all mythologies, but the special character of each nation or tribe modifies the form of the life-imputing stories.

In Ireland the tree, the stream were not dwelt in by a separate living being, as in Grecian story; the half-living powers they had were given to them from without, by the gods, the demons, the fairies; and in the case of the weapons, the powers they had of act or sound arose from the impassioned thoughts and fierce emotions of their forger or their wielder, which, being intense, were magically transferred to them.

The Celtic nature is too fond of reality, too impatient of illusion, to believe in an actual living spirit in inanimate things.