unavoidable means that you can't avoid it, that it's something that you have to deal with. The hurricane is unavoidable, and there's nothing that you can do to prevent it.
The accident was unavoidable, and no one was able to avoid it.
The argument was unavoidable, and there was no way to avoid it.
adjective
impossible to avoid or evade
Synonyms:
1
The conclusion is unavoidable that the sample must be biased.
2
It is unavoidable in the context of an encyclopaedia.
3
This is an unpleasant and unavoidable part of the search.
4
This process is continual, unavoidable and ineluctable.
5
Otherwise the mess is unavoidable in the long run.
6
Atheism leads to nihilism, not the belief but the unavoidable fact.
7
That might be the nature of the issue and unavoidable, but damn it is tiring.
8
The jargon used is unavoidable due to the nature of the subject.
9
Some haze around the base of the peak, but this is unavoidable and forgivable.
10
Combined with the inferior quality of concrete, the leaks were unavoidable.