CEFR C1
inconceivable
adjective
Meaning
Impossible to imagine, believe, or understand because it seems so unlikely or extreme.
Examples
- It is inconceivable that a team with such talent could lose every single game this season.
- The sheer scale of the universe is almost inconceivable to the human mind.
Synonyms: unlikely, unbelievable, unthinkable, improbable, unfathomable