unamenable
/ˌʌnˈæmɛnəbəl/Definitions
1. adjective
Impossible to manage or deal with; intractable.
“The situation became increasingly unamenable to a peaceful resolution.”
2. noun
A person or thing that is difficult to manage or deal with; a troublemaker.
“The company’s difficult clients were a source of constant frustration and were seen as unamenables by the staff.”