Lethal(adjective)
Very harmful or destructive.
Hindi meaning:घातक
Synonyms: Deadly, Fatal, Mortal, Noxious, Virulent, Pernicious
Antonyms: Harmless, Nonfatal, Safe, Beneficial
Example: She had been given a lethal dose of poison.
Trick to remember: Labs me aise chemicals bhi hai jo lethal hai 
