Antonyms of adv justly

1 of 2 senses of justly

Sense 1
rightly, justly, justifiedly -- (with honesty; "he was rightly considered the greatest singer of his time")
       Antonym of unjustly (Sense 1)
      => unjustly -- (in an unjust manner; "he was unjustly singled out for punishment")

Synonyms of adv justly

2 senses of justly

Sense 1
rightly, justly, justifiedly -- (with honesty; "he was rightly considered the greatest singer of his time")

Sense 2
justly, right -- (in accordance with moral or social standards; "that serves him right"; "do right by him")