The word "fossarian" is an adjective used to describe animals that live in burrows or tunnels, such as certain moles and rodents. It is pronounced /fɒˈseəriən/ (foh-SEER-ee-uhn) with the stressed syllable being the second one. The spelling of the word comes from the Latin word "fossa" meaning "ditch" or "trench". The suffix "-arian" means "related to" or "pertaining to". When combined, these elements create "fossarian", a word that describes creatures that inhabit underground tunnels and burrows.