execration (n.) Look up execration at Dictionary.com
late 14c., "cursing, act of laying under a curse," from Latin execrationem (nominative execratio) "malediction, curse," noun of action from past participle stem of execrari "to hate, curse," from ex- "out" (see ex-) + sacrare "to devote to holiness or to destruction, consecrate," from sacer "sacred" (see sacred). From 1560s as "an uttered curse."