From The Collaborative International Dictionary of English v.0.48:
Curse \Curse\ (k?rs), v. t. [imp. & p. p. Cursed (k?rst) or Curst; p. pr. & vb. n. Cursing.] [AS. cursian, corsian, perh. of Scand. origin; cf. Dan. korse to make the sign of the cross, Sw. korsa, fr. Dan. & Sw. kors cross, Icel kross, all these Scand. words coming fr. OF. crois, croiz, fr. L. crux cross. Cf. Cross.] 1. To call upon divine or supernatural power to send injury upon; to imprecate evil upon; to execrate. [1913 Webster]
Thou shalt not . . . curse the ruler of thy people. --Ex. xxii. 28. [1913 Webster]
Ere sunset I'll make thee curse the deed. --Shak. [1913 Webster]
2. To bring great evil upon; to be the cause of serious harm or unhappiness to; to furnish with that which will be a cause of deep trouble; to afflict or injure grievously; to harass or torment. [1913 Webster]
On impious realms and barbarous kings impose Thy plagues, and curse 'em with such sons as those. --Pope. [1913 Webster]
To curse by bell, book, and candle. See under Bell. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Curst \Curst\ (k?rst), imp. & p. p. of Curse. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Curst \Curst\, a. [SeeCurse.] Froward; malignant; mischievous; malicious; snarling. [Obs.] [1913 Webster]
Though his mind Be ne'er so curst, his tonque is kind. --Crashaw. [1913 Webster]