vzadu
Vzadu is a Czech adverb of place meaning "at the back" or "behind." It denotes a location relative to a reference point and is used to describe where something is situated within a space, such as a room, a vehicle, or a crowd. The word is common in both everyday speech and written Czech.
In use, vzadu describes position without requiring a separate preposition in many cases, and it can stand
Etymology and related notes: vzadu is formed from the root zad- meaning back, with a locational usage