noun, masculine/suˈnami/plural: tsunamis
tsunami is masculine in Spanish.
tsunami
“Going to high ground and staying there helped save lives during the 1960 Chilean tsunami, not only in Chile but also in Onagawa, Japan[…]. Damaging waves in Onagawa[…]reached heights of 14 feet.”
Borrowed from English tsunami, from Japanese 津波 (tsunami, “harbour wave”).