Antonyms of adv fruitlessly

1 sense of fruitlessly

Sense 1
unproductively, fruitlessly, unprofitably -- (in an unproductive manner)
       Antonym of fruitfully (Sense 1)
      => productively, fruitfully, profitably -- (in a productive way; "they worked together productively for two years")

Synonyms of adv fruitlessly

1 sense of fruitlessly

Sense 1
unproductively, fruitlessly, unprofitably -- (in an unproductive manner)