In a manner that does not change or cannot be moved

अपरिवर्तनीयता से

English Usage: She stood immovably in place, refusing to back down.

Hindi Usage: वह अपरिवर्तनीयता से अपने स्थान पर खड़ी रही, बिना पीछे हटने के।

Impossible to move physically or mentally; fixed

स्थिर

English Usage: His immovable opinion on the matter surprised everyone.

Hindi Usage: इस मामले में उसका स्थिर दृष्टिकोण सबको चौंकाया।