Lifeblood(noun)
The thing that keeps something strong and healthy and is necessary for successful development.
Hindi meaning:जीवन शक्ति
Synonyms: Soul, Essence, Core, Heart
Antonyms: Inactivity, Idleness, Laziness, Lethargy
Example: Tourism is the lifeblood of the city.
Trick to remember: Life me blood lifeblood hai. 
