Excessively responsive to stimuli, often leading to intense reactions.

अत्यधिक उत्तेजक

English Usage: The hyperexcitable puppy couldn't sit still during the training session.

Hindi Usage: अत्यधिक उत्तेजक पिल्ला प्रशिक्षण सत्र के दौरान एक जगह भी नहीं बैठ सका।