Past Tenses
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Efficiently Antonyms

Trying to find opposite word for efficiently in English? No problem. Our site contains antonyms of efficiently in 3 different contexts. We have listed all the opposite words for efficiently alphabetically.

difficultly
  • arduously
  • laboriously
  • rigorously
  • strenuously
insufficiently
  • inadequately
  • incompletely
  • partly
questionably
  • uncertainly
  • undecidedly

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