The word "涌出" is formed by combining the character "涌", which itself consists of the water radical (氵) indicating a liquid-related action like gushing or surging, with the phonetic component "甬" suggesting its pronunciation, and the character "出", which pictographically represents exiting or moving outward. Together, "涌" conveys the action of surging, typically of fluids, and "出" adds the directional sense of outward movement, resulting in a compound meaning of "to gush out" or "to surge forth".