Antonyms of adv unlawfully

1 sense of unlawfully

Sense 1
unlawfully -- (not conforming to the law; "they were unlawfully married")
       Antonym of lawfully (Sense 2)
      => legally, lawfully, de jure -- (by law; conforming to the law; "we are lawfully wedded now")

Synonyms of adv unlawfully

1 sense of unlawfully

Sense 1
unlawfully -- (not conforming to the law; "they were unlawfully married")