unthinkable

Instead, the tight-knit culture permits visitors to simply "walk in and say hello" - almost unthinkable in other parts of the country.

The very idea that it might lose its status as the world's reserve currency has been unthinkable.

All of this was unthinkable under Assad, as Syrians could never protest freely for fear of reprisals.

Five days after George's death, Rhian faced the unthinkable when her husband Paul took his own life.

Thank you for doing the unthinkable to a team desperate for the impossible.