Answer:
What word becomes shorter when you add two letters to it?
Man walks over, man walks under, in times of war he burns asunder. What is it?
To cross the water I'm the way. For water I'm above I touch it not and truth to say I neither swim nor move.
I canβt go left I canβt go right. I am forever stuck in a building over three stories high.
I am what bring things together. Without me everything you see would be a total mass or debris everywhere.
I'm the source of all emotion but I'm caged in a white prison.