The Collaborative International Dictionary of English v.0.48:

Accursed \Ac*cursed"\, Accurst \Ac*curst"\, p. p. & a.
   Doomed to destruction or misery; cursed; hence, bad enough to
   be under the curse; execrable; detestable; exceedingly
   hateful; -- as, an accursed deed. --Shak. -- Ac*curs"ed*ly,
   adv. -- Ac*curs"ed*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

accurst
    adj 1: under a curse [syn: accursed, accurst, maledict]