Witcher
Witchers (originally translated as "hexers") are sterile mutants with supernatural abilities, who receive special training at Kaer Morhen and preparation in order to become professional monster slayers for hire. It is believed (even amongst themselves) that they are unable to have emotions, although really doesn't seem to be true. Geralt, the central character in the Witcher series, is said in the stories to be one of the best witchers. He is certainly legendary, but whether famous or infamous is questionable.
A witcher has 2 main tools:
his Witcher's steel sword, and
his Witcher's silver sword.
On the continent, "witcher" is a derogatory term constructed from the word witch (wiedźma) and used by mages to describe males with what they consider to be limited or inferior magical ability.