Unicode calls it HYPHEN-MINUS. It does also have an unambiguous ‘−’ MINUS SIGN as well as ‘‐’ U+2010 HYPHEN and the various dashes, but most people use bad keyboard layouts.

And different "SS" for any case where the lowercase was an sz, of course at some point Germany introduced an uppercase SZ character to avoid that round trip loss issue, but we still have tons of text that use the old sz -> SS conversion. Also note that "y" in Germany, not all German speaking countries follow the same rules for sz, some dropped it entirely. We basically need something like the time zone database to have even a snowballs chance in hell to handle text correctly.