steadfastly russian

• неотсту́пно

  persistently, unswervingly, relentlessly, steadfastly

• неколебимо

  unshakably, steadfastly, unwaveringly, firmly

• непоколеби́мо

  unswervingly, steadfastly, immovably, unshakably

Examples

• Судья непреклонно стоял на своём мнении.

  The judge steadfastly stood by his opinion.

• Он непоколебимо верил в свою правоту.

  He steadfastly believed he was right.