noun
a person who refuses, denies, or opposes, esp. because of cynicism or pessimism. They went ahead with their ambitious plan despite the arguments of the naysayers.
1. to involve in conflict. example:The small nation embroiled its neighbor in a dispute over boundary lines. example:Don’t embroil me in your squabbles!
2. to confuse or complicate. example: During the Reign of Terror which began in 1792, he behaved with an energy and an intrepidity honorable to him as a man; in general, however, his course tended to embroil and not to guard American interests. (Henry Jones Ford, Washington and his colleagues; a chronicle of the rise and fall of federalism)