Unthinkable

What is Unthinkable ?

Unthinkable is adj 1. which cannot be considered or thought of It would be unthinkable not to celebrate Christ- mas with the children. Going to live in a foreign country was unthinkable only a few years ago. 2. to think the unthinkable to consider plans which go totally against what is normal practice

 

source: Easier English, Student Dictionary Upper Intermediate Level