noun, masculine/ˈpoθo/plural: pozos
pozo is masculine in Spanish.
well (hole in the ground as a source of water or other fluids)
Related: bajar al pozo, buque de pozo, mi gozo en un pozo, pozal, pozo artesiano, pozo ciego, pozo de lobo, pozo de nieve, pozo de petróleo, pozo escalonado
Inherited from Old Spanish poço, itself from Latin puteus, ultimately from Proto-Indo-European *paw- (“to strike”). Compare English pit.