Sabotage (noun)

1. The deliberate destruction or damaging of equipment, buildings, etc.
2. The deliberate obstruction of a process or activity.
3. The act of causing damage to an enemy's war effort.
4. The act of deliberately causing problems in order to disrupt something.

Origin:

From french sabotage, from sabot "clog" (because workers would throw their wooden clogs, or sabots, into the machinery to stop it working), from old french sabot, from provençal sabot "wooden shoe". the verb form first appeared in english in 1915. .

Examples:

1. The workers were accused of sabotage when the factory machinery was destroyed.
2. The company's profits were hit by sabotage from a rival company.
3. During the war, sabotage was a common tactic used by both sides.
4. The employee's sabotage of the project caused a significant delay.
5. The sabotage of the plan to merge the companies was successful.