gnarled 
(närld)
(närld)adj.
1. Having gnarls; knotty or misshapen: gnarled branches.
2. Rugged and roughened, as from old age or work: the gnarled hands of a carpenter.
[Probably variant of knarled, from knarl, tangle, knot, alteration of Middle English knarre, knot in wood; see KNAR.]