Trench
It is a ditch.
The men dug a deep ditch to lay pipes for the new septic tank. I fell in the ditch, but luckily it was dry.
Another word for a deep ditch that is dug around a castle is a moat. You could call it a trench, or you could fill it full of water and call it a moat.
they dug the ditchwith shovels made outof stone
1 meter
in a den that is dug in the ground
The grey wolf's shelter is usually a den dug in the ground on a hillside or it can be underground with a tunnel about three meters long leading to where the cubs are.
The Irish immigrants dug the ditch and the German stone cutters created the locks.
There is no such word in English.Perhaps you are thinking of the word "ditch" which is a shallow channel dug to carry surface water away.
A trench was a ditch deep enough for a soldier to stand in without being exposed to enemy fire. To shoot over the edge there were raised ledges to step up onto. Sometimes small dugout were dug into the sides of the trenches for soldiers to sleep and take shelter in.
Emus do not have any specific shelter at night time. They may shelter under large trees or near bushes, as long as they are not completely out in the open. They only ever build nests at breeding time; these nests are dug out of the ground and lined with sticks, leaves and grass.
A military dugout is a pit or deep trench dug into the ground and used as a shelter.