Knotty, twisted (7)
I believe the answer is:
gnarled
I believe this is a double definition.
'knotty' is the first definition.
(synonyms)
'twisted' is the second definition.
(gnarling is a kind of twisting)
(Other definitions for gnarled that I've seen before include "Knobbly and twisted (of wood)" , "Old, twisted, and weathered" , "Rugged" , "Knotty" , "Covered with knobs or knots, tree say" .)