Source : Webster's Revised Unabridged Dictionary (1913)

Effectually \Ef*fec"tu*al*ly\, adv.
   1. With effect; efficaciously.

   2. Actually; in effect. [Obs.] --Fuller.

Source : WordNet®

effectually
     adv : in an effectual manner; "Bismarck was constantly criticised
           by the more liberal newspapers, and he retaliated by
           passing an emergency decree that effectually muzzled
           the press" [ant: {ineffectually}]