'Taqueria' is a modern loanword from Mexican Spanish, entering widespread English usage in the late 20th century alongside the growing popularity of Mexican cuisine in the United States. Its structure is transparent in Spanish, combining 'taco' with the productive suffix '-ería', which denotes a place of business, similar to '-ery' in English (as in 'bakery'). While the ultimate origin of 'taco' is debated, its journey into English bypasses the need for morpheme analysis of its Spanish components, as the word is borrowed and understood in English as a single, unanalyzed unit referring to a specific type of restaurant. It exemplifies how culinary and cultural exchange directly imports new lexical items to fill semantic gaps.

The word is a direct loan from Mexican Spanish. It is formed from the Spanish noun 'taco' (a taco) + the Spanish suffix '-ería' (a place where something is made or sold). The Spanish 'taco' itself has a complex history, possibly from a Nahuatl word meaning 'plug' or 'wad', or from the Spanish 'taco' meaning 'dowel' or 'cue stick', referring to the shape.