necessarily
Definitions
As a necessary result; inevitably.
In such a way that it cannot be otherwise.
Used to express that something is not always the case, typically in a negative context.
Examples
A high salary does not necessarily lead to personal happiness.
Just because he is quiet does not necessarily mean he is shy.
Synonyms
inevitably unavoidably certainly compulsorily by definition as a matter of course
Antonyms
optionally possibly coincidentally avoidably by chance not required