mar-feast

As for Face-of-god, he went about the Hall soberly, and spake no more than behoved him, so as not to seem a mar-feast; for the image of the slaughter to be yet abode with him, and his heart foreboded the after-grief of the battle.

The Roots of the Mountains; Wherein Is Told Somewhat of the Lives of the Men of Burgdale William Morris 1865

I will drink a round with your guests with all my heart, rather than be termed a mar-feast.”

Kenilworth 2004

So they ate and drank together, and the Sea-eagle and his mate became very joyous again, and Hallblithe bestirred himself not to be a mar-feast; for he said within himself: "I am departing, and after this time I shall see them no more; and they are kind and blithe with me, and have been aforetime; I will not make their merry hearts sore.

The Story of the Glittering Plain; or, the land of Living Men William Morris 1865