incapable of being changed or altered

अपरिवर्तनीय

English Usage: The scientist's theory was immutable, remaining unchanged despite new evidence.

Hindi Usage: वैज्ञानिक का सिद्धांत अपरिवर्तनीय था, जो नए साक्ष्यों के बावजूद अनचेंज्ड रहा।

unchanging over time or unable to be changed

अविचल

English Usage: Her love for art was immutable, lasting throughout her life.

Hindi Usage: कला के प्रति उसका प्रेम अविचल था, जो उसके जीवन भर बना रहा।