Effectually and Mainly

adverb

• In an effectual manner.
  • usage: "Bismarck was constantly criticised by the more liberal newspapers, and he retaliated by passing an emergency decree that effectually muzzled the press"

• (adv.) With effect; efficaciously.
• (adv.) Actually; in effect.

adverb

• For the most part.
  • usage: "he is mainly interested in butterflies"
  • synonyms: chiefly, principally, primarily, in the main

• (adv.) Principally; chiefly.
• (adv.) Very strongly; mightily; to a great degree.