inconceivable
adjectiveformal/ĩkõsɨˈbivɛɫ/medium
in·con·ce·bí·vel
Definition
Not capable of being imagined or grasped mentally; completely unbelievable or impossible.
It is inconceivable that they could have survived the crash.
To people a century ago, space travel was inconceivable.
Common collocations
simply inconceivablevirtually inconceivableinconceivable idea
Etymology
Do latim 'inconceptibilis', de 'in-' (negação) + 'concipere' (conceber).