jinx

(noun) a person believed to bring bad luck to those around him. Synonyms: jonah.

(noun) an evil spell. Synonyms: hex, curse, whammy. Examples: "A witch put a curse on his whole family." "He put the whammy on me."

(verb) cast a spell over someone or something; put a hex on someone or something. Synonyms: hex, bewitch, glamour, witch, enchant.

(verb) foredoom to failure. Example: "This project is jinxed!."