The word "涮火锅" is formed by combining the verb "涮" (shuàn), which means to swish or rinse, typically referring to the action of briefly dipping food into boiling liquid, with the noun "火锅" (huǒguō), which literally means "fire pot" and denotes the cooking vessel and method of hot pot. This creates a verb-object compound where "涮" describes the action and "火锅" serves as the object, directly referring to the activity of eating hot pot by dipping ingredients into a simmering broth.