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Mortality (Noun) - Death rate, mortality, rate of mortality. (मृत्यु दर)

Ex - The infant mortality rate (less than five death rates) has fallen to 53 per thousand births. (शिशु मृत्यु दर (पांच वर्ष से कम आयु वाले शिशुओं की मृत्यु दर) गिरकर 53 प्रति हजार जन्म हो गई है। )

grim (Adjective) - monstrous, acute, grim, knotty, formidable, inextricable. (विकट)

Ex - Bewildered amidst the violence and tension all about them they did not know how to meet the grim challenge of life. (हिंसा और वातावरण में फँसे हुए लोग यह समझ नहीं पा रहे थे कि इस गंभीर चुनौती का मुक़ाबला कैसे किया जाए। )