frustrated

When you feel frustrated, it means you feel upset or angry because something is not going the way you want it to go. For example, imagine you are trying to build a tall tower with blocks, but it keeps falling down. You might feel frustrated because you wanted the tower to stay up, but it keeps falling.

Another example is when you are trying to put together a puzzle, but you can't find the right piece. You might feel frustrated because you want to finish the puzzle, but you can't find the piece you need.