assiduously russian

• уси́ленно

  strenuously, intensely, hard, assiduously

  insistently, emphatically, urgently

• усе́рдно

  diligently, hard, assiduously, zealously

• приле́жно

  diligently, industriously, assiduously, studiously

• стара́тельно

  diligently, painstakingly, assiduously, studiously

• неосла́бно

  unremittingly, assiduously