assiduous russian

• стара́тельный

  diligent, assiduous, painstaking

  industrious

• трудолюби́вый

  hard-working, industrious, diligent, assiduous

• и́стовый

  earnest, assiduous, fervent, zealous

• неосла́бный

  unremitting, assiduous, unabated

• уси́дчивый

  assiduous, diligent

• стара́ющийся

  trying, making an effort, diligent, painstaking, assiduous

• усе́рдствовавший

  diligent, zealous, assiduous, industrious (who was diligent)

• усе́рдствующий

  diligent, zealous, assiduous, striving

• уси́ленно

  strenuously, intensely, vigorously, assiduously, hard

• приле́жно

  diligently, industriously, assiduously, studiously

• стара́тельно

  diligently, with application, with assiduity, studiously, assiduously, zealously

• неосла́бно

  unremittingly, assiduously