unthinkably

The cost of living in the city center has become unthinkably high for a family living on a minimum wage.

(Chinese) 对于一个靠最低工资生活的家庭来说，市中心的生活成本已经高得难以想象。

Long ago, it was unthinkably difficult to communicate with someone on the other side of the planet instantly.

(Chinese) 在很久以前，要即时与地球另一端的人沟通是难以想象地困难。