Antonyms of adv lawfully

2 senses of lawfully

Sense 1
legitimately, lawfully, licitly -- (in a manner acceptable to common custom; "you cannot do this legitimately!")
       Antonym of lawlessly (Sense 1)
      => illegally, illicitly, lawlessly -- (in an illegal manner; "they dumped the waste illegally")

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

Synonyms of adv lawfully

2 senses of lawfully

Sense 1
legitimately, lawfully, licitly -- (in a manner acceptable to common custom; "you cannot do this legitimately!")

Sense 2
legally, lawfully, de jure -- (by law; conforming to the law; "we are lawfully wedded now")