IPA: /ˈnɒtɪnəs/
KK: /ˈnɑtɪnəs/
The condition of having many knots or being difficult to untangle.
The knottiness of the rope made it hard to use for climbing.
Knottiness is formed from "knot" (from Old English "cnotta", meaning a tied or interlaced structure) and "-iness" (meaning the quality of). The word describes the quality of being full of knots or having many knots.
Think of a 'knot' as something tied together, and '-iness' refers to the quality of that. So, knottiness means the quality of being full of knots.