Alarmist(noun)
Someone who exaggerates a danger and so causes needless worry or panic.
Hindi meaning:भय उत्पन्न करनेवाला, भय फैलानेवाला
Synonyms: Scaremonger, Pessimist, Doomsayer
Antonyms: Optimist, Pollyanna
Example: The government has dismissed newspaper reports of 200 dead as being alarmist
Trick to remember: Alarm jari karna pdta hai alarmist ki vjah se 
