Norse Mythology discussion

I didnt understand how was Kvasir alive?

i just recently finished the book (just yesterday in fact haha) and i'm also not an expert so don't quote me on this ,(spoiler warning obviously) But i think after odin retrieved the mead that was mead from kvasir blood he must've somehow used it to revive him cause if memory serves me correctly they mentioned earlier in that very story that gods don't have to stay dead and perhaps there is a way for them to revive now the exact method used to revive him that i don't know and i dont think it was mentioned directly either in the book at least ill check online about the mythology side of things and keep you updated
tl;dr he got revived using the mead made from his blood by odin most probably