A sound that is reflected off a surface and heard again.

A repetition or imitation of something, often in a metaphorical context.

पुनरावृत्ति (Punaravritti)

English Usage: His speech was just an echo of previous ideas.

Hindi Usage: उसका भाषण बस पिछले विचारों की पुनरावृत्ति थी।

A response to something, either emotionally or chemically.

A person’s emotional response to a situation.

भावनात्मक प्रतिक्रिया (Bhaavnatmak Pratikriya)

English Usage: Her reaction to the news was one of shock.

Hindi Usage: समाचार पर उसकी प्रतिक्रिया सदमे में थी।