Russian-English translations for де́йствовать

• act
  an act of goodwill
  He was caught in the act of stealing
  The pivotal moment in the play was in the first scene of the second act
• influence
  I have absolutely no influence over him
  Im not able to exercise influence over him
  He has been a great influence on the voters during the elections
• operate
  to operate a machine
• take effect
  The medication wont begin to take effect for 3-4 hours.