adjective / noun
impossible
im-PAH-suh-buhl/ɪmˈpɑːsəbl/
Beyond what can be achieved.
It is impossible to push the ball through the smaller opening.

Etymology
Possibilis expresses capability—something can be done. The negative prefix denies that capability altogether, giving the sense of something that cannot happen, exist, or be accomplished.
In context
again this can't be done because to quote Saint athanasius to comprehend what the essence of God is is impossible
More examples
- With everyone shouting, it is impossible to hear the instructions.
- The team achieves the impossible and finishes a week early.
- This schedule makes it impossible for me to attend both meetings.
Forms
impossible
impossibility noun — The state of being beyond achievement.
Similar words
- unattainable
- Describes a goal or standard that cannot be reached.
- infeasible
- Describes plans that cannot work under the available conditions.