B1
needed in order to achieve something
Dictionary examples:
Is it necessary to wear pants while working from home? (0.0)
Is it necessary to study math? I want to be a wizard! (0.0)
Is it really necessary to shower every day? I'm saving water! (0.0)
Is it necessary to give so much detail? (19.1)
If necessary, we can change the dates of our trip. (19.5)
We don't want to take any more luggage with us than is necessary. (20.6)
I won't stay any longer than necessary. (23.9)
He lacks the necessary skills for the job. (33.4)