unexorable
/ˌʌnɛkˈsɔrəbəl/Definitions
1. adjective
Impossible to be swayed or persuaded; unyielding
“The unexorable judge refused to budge from his initial verdict.”
2. noun
A person or thing that is impossible to be swayed or persuaded
“The unexorable tyrant ruled with an iron fist.”