Steyr is a proper noun, most often a Germanic surname or toponym (as in the Steyr region of Austria) used to refer to the Austrian gun and vehicle manufacturer Steyr-DAM, as well as the city of Steyr. In English usage, it is pronounced as a single word, typically in IPA with initial stress on the first syllable, and the final sound resembling a rhotic-tinged /ɹ/ in many dialects. It functions as a name rather than common vocabulary.
Full pronunciation guide