saboteur

Noun saboteur has 2 senses

• saboteur(n = noun.person) diversionist, wrecker - someone who commits sabotage or deliberately causes wrecks;
is a kind of destroyer, ruiner, undoer, uprooter, waster
has particulars: sleeper

• saboteur(n = noun.person) fifth columnist - a member of a clandestine subversive organization who tries to help a potential invader;
is a member of fifth column, trojan horse
is a kind of traitor, treasonist