Antonyms of adv favorably

1 sense of favorably

Sense 1
favorably, favourably -- (showing approval; "he reviewed the play favorably")
       Antonym of unfavorably (Sense 1)
      => unfavorably, unfavourably -- (showing disapproval; in a disparaging way; "he reviewed the play unfavorably")

Synonyms of adv favorably

1 sense of favorably

Sense 1
favorably, favourably -- (showing approval; "he reviewed the play favorably")