そう; そうです
そう; そうです · sou; soudesu · JLPT N5 · noun
appears
sou sounds like so: Is that so? It is so = sou desu
English so and Japanese sou overlap by happy accident: both mean in that way. Add desu (is) and you get it is so, the polite way to agree: yes, that's right. After a verb or adjective stem, sou means it seems so.