hex

(noun) an evil spell. Synonyms: jinx, 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: bewitch, glamour, witch, enchant, jinx.

(adj) of or pertaining to a number system having 16 as its base. Synonyms: hexadecimal.