hex 1 
(hĕks)
(hĕks)n.
1. An evil spell; a curse.
2. One that brings bad luck.
tr.v. hexed, hex·ing, hex·es
1. To put a hex on.
2. To bring or wish bad luck to: "Chilly evening weather and a chain of minor snafus seemed to hex the $5,000-a-seat gala on Governors Island" (Newsweek).
[Pennsylvania Dutch, from German hexen, to hex, from Hexe, witch, from Middle High German hecse, from Old High German hagzissa.]
hexer n.