humo
/ˈumo/ · B1 · noun · m
smoke
💨 Latin fumus became humo: Spanish swapped f for h, so humo = fume
Old Spanish often turned a Latin f- into h-: fumus became humo, as filius became hijo and facere became hacer. The h is silent, so it is said OO-mo. English fume and fumigate come from the same root.