effort
/ˈefət ˈए̮फ़ट्/ noun 1 [U] the physical or mental strength or energy that you need to do something; something that takes a lot of energy मानसिक या शारीरिक प्रयास (कोई काम करने के लिए अपेक्षित); ऐसा कार्य जिसमें बहुत शक्ति या प्रयास लगे
They have put a lot of effort into their studies this year.
He made no effort to contact his parents.