Even though it was getting dark, we decided to walk on to the next village.

even 在这里是副词，用来加强语气，表示"即使、尽管"的意思。 though 是连词，表示"虽然、尽管"，用于引导让步状语从句。 even though 是一个固定搭配，表示"即使、尽管"，用来引导让步状语从句，语气比单独的 though 更强。