den [dens](home of certain animals) noun [UK: den] [US: ˈden]This island is a pirates' den. = Esta isla es una guarida de piratas.
hideout(A place to hide) noun [UK: ˈhaɪ.daʊt] [US: ˈhaɪ.ˌdɑːwt]
lair [lairs](of an animal) noun [UK: leə(r)] [US: ˈler]The octopus only exits its lair to look for food or for reproductive purposes. = El pulpo solo sale de su guarida para buscar comida o con fines de reproducción.