IPA: //ˈtɔː.tʃu.əs.nəs//
KK: /ˈtɔr.tʃu.əs.nəs/
The quality of being full of twists and turns; not straightforward or direct.
The tortuousness of the mountain road made the journey longer than expected.
Tortuousness → It is formed from "tortuosus" (from Latin, meaning full of twists and turns) and the suffix "-ness" (meaning the state or quality of). The word "tortuousness" refers to the quality of being full of twists and turns, or being complex and intricate.
Think of something that is 'full of twists' ('tortuosus') — that helps you remember that 'tortuousness' means the quality of being twisted or complicated.