"suitable for a funeral" (mournful, dismal, gloomy), 1725, from stem of Latin funereus "of a funeral," from funus "funeral; death" (see funeral) + -al (1). Perhaps by influence of French funerail.
suffix forming adjectives from nouns or other adjectives, "of, like, related to, pertaining to," Middle English -al, -el, from French or directly from Latin -alis (see -al (2)).
