uncertainty or lack of stability

susceptibility to change or fluctuation

परिवर्तनशीलता

English Usage: The instability in her mood made it hard to predict her reactions.

Hindi Usage: उसके मूड की अस्थिरता ने उसकी प्रतिक्रियाओं की भविष्यवाणी करना मुश्किल बना दिया।

the act of exciting or stimulating

a state of being excited or energized

उत्तेजित स्थिति

English Usage: The excitation in the lab led to groundbreaking discoveries.

Hindi Usage: प्रयोगशाला में उत्तेजना ने मौलिक खोजों को जन्म दिया।