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sab‧o‧tage1
[transitive]
[transitive]1 to secretly damage or destroy equipment, vehicles etc that belong to an enemy or opponent, so that they cannot be used :
Every single plane had been sabotaged.
Every single plane had been sabotaged.2 to deliberately spoil someone's plans because you do not want them to succeed :
Demonstrators have sabotaged the conference.
Demonstrators have sabotaged the conference.