Inscrutable is an adjective that is used to describe something which is difficult to understand. Mysterious, impenetrable, unfathomable.
- His idea was ‘inscrutable’ at the beginning. But after months of work on the project, the sense of creativity and genius was being displayed to the world.
- They called her the ” ‘inscrutable’ woman “.
- The final part of the test was an ‘inscrutable’ problem, which would distinguish the best from the average.