Sabotage
Sabotage , noun
[French]
1.
(a) Scamped work.
(b)
Malicious waste or destruction of an employer's property or injury to his interests by workmen during labor troubles.
2.
any surreptitious destruction of property or obstruction of activity by persons not known to be hostile; -- in war, such actions carried out behind enemy lines by agents or local sympathisers of the hostile power.