really; in the very …В самом деле means “really” or “indeed.” Before a noun, в самом means “in/at the very …,” as in в самом конце (“at the very end”).
RU: В самом центре города есть парк.
EN: There’s a park right in the center of the city.
reallyIn the fixed phrase «в самом деле», it means “really” or “indeed.” In other contexts, it means “in the very,” as in «в самом сердце» (“in the very heart”).