adjective: not easily handled, managed, or controlled
From Latin tractare (to handle), frequentative of trahere (draw).
Earliest documented use: 1545
Usage (from Wordsmith)
“Leeds have traditionally employed the most dour, most intractable men outside of the Democratic Unionist Party as their managers. Now this. A man who can smile.”
Tom Humphries; Pain and Suffering Continues as Usual; Irish Times (Dublin); Nov 16, 1998.