necessity

/nəˈsesəti नˈसे̮सटि/ noun

( pl. necessities )

1 [U] necessity (for something/to do something) the need for something; the fact that something must be done or must happen (किसी वस्‍तु की) आवश्‍यकता, अपेक्षा; (किसी बात की) अनिवार्यता

Is there any necessity for change?

They sold the car out of necessity [because they had to].

2 [C] something that you must have आवश्‍यक वस्‍तु

Clean water is an absolute necessity.