piscina
/pisˈθina/ · B1 · noun · f
swimming pool
🏊🐟 Latin piscis = fish, like Pisces: a piscina was first a fishpond
Latin piscina meant fishpond, from piscis (fish). The same root gives Pisces and Spanish pez. Romans also used the word for bathing pools, so the fish tank turned into the swimming pool.