1. to be difficult to manage, control, or deal with; to be stubborn or unmanageable
The problem has proven to be intractable despite our best efforts.
O problema mostrou-se intratável apesar dos nossos melhores esforços.
2. to be unwilling to accept advice or be guided; to be obstinate
He can be intractable when it comes to changing his mind.
Ele pode ser intratável quando se trata de mudar de opinião.