0 impossible to avoid -- inevitable
1 not able to be avoided -- inevitable [ masculine-feminine, singular ]
an unavoidable accident un accidente inevitable
The delays were unavoidable. Los retrasos fueron inevitables.
In any reform process there is an unavoidable gap between original design and effective implementation.
However, we wish to be as restrictive as possible here, so we would rather talk about unavoidable contamination than just contamination.
Manufacturers may protest, but stricter measures are unavoidable.
That is human and perhaps unavoidable.
This is not about unavoidable technical uncertainty.
Its further safe development is simply unavoidable.
