Antonyms of adv efficaciously

1 sense of efficaciously

Sense 1
efficaciously, effectively -- (in an effective manner; "these are real problems that can be dealt with most effectively by rational discussion")
       Antonym of inefficaciously (Sense 1)
      => inefficaciously, ineffectively -- (in an ineffective manner; "he dealt with the problem rather ineffectively")

Synonyms of adv efficaciously

1 sense of efficaciously

Sense 1
efficaciously, effectively -- (in an effective manner; "these are real problems that can be dealt with most effectively by rational discussion")