rogue

(noun): A scoundrel, rascal or unprincipled, deceitful, and unreliable person.
(noun): A mischievous scamp.
(noun): A vagrant.
(noun): Deceitful software pretending to be anti-spyware, but in fact being malicious software itself.
(noun): An aggressive animal separate from the herd, especially an elephant.
(noun): A plant that shows some undesirable variation.
(noun): A character class focusing on stealthy conduct.
(verb): To cull; to destroy plants not meeting a required standard, especially when saving seed, rogue or unwanted plants are removed before pollination.
(verb): To cheat.
(verb): To give the name or designation of rogue to; to decry.
(verb): To wander; to play the vagabond; to play knavish tricks.
(adjective): (of an animal, especially an elephant) Vicious and solitary.
(adjective): (by extension) Large, destructive and unpredictable.
(adjective): (by extension) Deceitful, unprincipled.
(adjective): Mischievous, unpredictable.