IPA: /ɪnˈtræktəbli/
KK: /ɪnˈtræktəbli/
In a way that is difficult to manage or control; stubbornly or unyieldingly.
The problem was intractably complex, making it hard to find a solution.
Intractably → It is formed from "in-" (meaning not) and "tractabilis" (from Latin, meaning able to be drawn or pulled). The suffix "-ly" indicates the manner of the action. Thus, "intractably" means in a manner that cannot be drawn or managed, indicating stubbornness or resistance to change.
Think of 'not able to be drawn' ('in-' means not, and 'tractabilis' means able to be pulled) to remember that 'intractably' describes something that is stubborn or difficult to manage.