operose

英

美

adj.  刻苦的；费力的；困难的

英英释义

adj

• characterized by effort to the point of exhaustion
  1. worked their arduous way up the mining valley
  2. a grueling campaign
  3. hard labor
  4. heavy work
  5. heavy going
  6. spent many laborious hours on the project
  7. set a punishing pace
  Synonym:arduousbackbreakinggruelinggruellinghardheavylaboriouspunishingtoilsome