/ ˌsæbəˈtɜː(r); NAmE / noun
a person who does deliberate damage to sth to prevent an enemy from using it, or to protest about sth :
Saboteurs blew up a small section of the track.
( BrE )
hunt saboteurs (= people who try to stop people from hunting foxes , etc.)
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WORD ORIGIN
early 20th cent.: from French , from the verb saboter kick with sabots (a simple shoe), wilfully destroy.