IPA: /ɪnˈtræktəˌbɪlɪti/
KK: /ɪnˈtræktəˌbɪlɪti/
The quality of being difficult to manage, control, or deal with; stubbornness.
The intractability of the problem made it hard for the team to find a solution.
Intractability → It is formed from "in-" (meaning not), "tractare" (meaning to pull or drag), and "-ability" (meaning the quality of being). The word describes the quality of being not able to be pulled or managed easily, hence difficult to control or deal with.
Think of something that cannot be easily 'pulled' or managed — 'in-' means not, 'tractare' means to pull, and '-ability' refers to the quality of that state.