unimpressible vs unreconcilable

unimpressible

adj

  • Not impressible; not sensitive; apathetic. 

unreconcilable

adj

  • Irreconcilable. 

noun

  • A person or thing that cannot be reconciled. 

How often have the words unimpressible and unreconcilable occurred in a corpus of books? (source: Google Ngram Viewer )