o c and co possibly American
quipu
Quipa.
A rope knotted every cubit.
The quipa rope is actually just a knotted rope and it was used for counting in some countries
a tribe of hunter-gatherers who used pottery and rope for art
I think they might have done rope pottery? I might be confusing that with my Japanese history...
Jōmon pottery is accepted to be the oldest known Japanese pottery. It is a rope pattern, and is as old as 10000 BCE.
To untangle a knotted rope efficiently and effectively, start by identifying the main knot and any smaller tangles. Gently work on each tangle separately, using your fingers to loosen the knots. If needed, use a pointed object like a needle or a small stick to help untangle tight knots. Patience and persistence are key to successfully untangling a rope.
Cornrows are very tight plaits. Dreadlocks are knotted, matted hair that form into rope-like locks.
Apples work somewhat but rawhide or a heavy knotted rope work better to clean a dogs' teeth.
A tribe of hunter-gatherers who used pottery and rope for art
A knot