What is the meaning of Knotty?

Of string or something stringlike: full of, or tied up, in knots.

Of a part of the body, a tree, etc.: full of knots (knobs or swellings); gnarled, knobbly.

  1. Complicated or tricky; complex, difficult.

    Complicated or tricky; complex, difficult.

    Of an austere or hard nature; rugged.

    knotted, tied, linked

    knotty, tangled, twisted

    knobby, bumpy, clumped

    knoblike, protruding

    Source: wiktionary.org