behelm

To cover; cover over.

And hundred-folded Briareus, and Lerna's Worm of dread Fell hissing; and Chimaera's length and fire-behelmed head, [...]

He went to the Thing in gold-reddened helm, and all his company was behelmed.

To cover as with a helm or helmet.

Stepped forth a virgin, with behelmed head Like to a martial goddess, fair at once And dreadful to behold; [...]

Now come the days for fighting to the finish, bemail thy body and behelm thy head; Rally all those that desert thee, and put away forests and dice.