Jackboot (noun)

1. A heavy military boot reaching the calf, worn especially by cavalry or armored troops.
2. A symbol of extreme military or political control or oppression.

Origin:

Early 17th century: from jack "man" + boot.

Examples:

1. The jackboots of the soldiers made a loud clatter on the cobblestone streets.
2. The jackboots were seen as a symbol of fear and tyranny by the people.
3. The jackboots were issued to soldiers for added protection in battle.
4. The sight of the jackboots marching down the street filled the people with dread.
5. The jackboots became a symbol of Nazi Germany and its military expansion during World War II.