Use the word funerary for things that have to do with funerals or other burial ceremonies. Ancient Egyptian pharaohs had complex funerary rituals, including mummification, to ensure they would be immortal.
Funerary shares a root with funeral, the Latin funus, which means "burial rites," and also "death or corpse." When people talk about funerary practices, they mean the different ways cultures, religions, or even individual families mark the death of loved ones and relatives. Funerary traditions can involve burial, cremation, wearing black, singing hymns, wailing, displaying photos of the deceased person, saying prayers, or dancing.