ne‧ces‧sar‧i‧ly S1 W2
possibly, but not certainly:
That is not necessarily true.
Expensive restaurants aren't necessarily the best.
Having this disease does not necessarily mean that you will die young.
'So the school will have to close down, then.' 'Not necessarily.'
in a way that cannot be different or be avoided [= inevitably]:
The care of old people necessarily involves quite a lot of heavy lifting.