gigantesco
/xiɡanˈtesko/ · B2 · adj
gigantic, gigantesque
🗿 gigante + -esco (like -esque): giant-esque, so gigantesco means gigantic
Spanish gigante (giant) plus the suffix -esco, the same as English -esque. Gigantesco is literally giant-esque. English gigantesque comes from the same root.