Antonyms of adv accidentally

2 of 3 senses of accidentally

Sense 1
by chance, accidentally, circumstantially, unexpectedly -- (without advance planning; "they met accidentally")
       Antonym of deliberately (Sense 1)
      => intentionally, deliberately, designedly, on purpose, purposely, advisedly, by choice, by design -- (with intention; in an intentional manner; "he used that word intentionally"; "I did this by choice")

Sense 3
unintentionally, accidentally -- (without intention; in an unintentional manner; "she hit him unintentionally")
       Antonym of deliberately (Sense 1)
      => intentionally, deliberately, designedly, on purpose, purposely, advisedly, by choice, by design -- (with intention; in an intentional manner; "he used that word intentionally"; "I did this by choice")

Synonyms of adv accidentally

3 senses of accidentally

Sense 1
by chance, accidentally, circumstantially, unexpectedly -- (without advance planning; "they met accidentally")

Sense 2
incidentally, accidentally -- (of a minor or subordinate nature; "these magnificent achievements were only incidentally influenced by Oriental models")

Sense 3
unintentionally, accidentally -- (without intention; in an unintentional manner; "she hit him unintentionally")