"gnarly" in the adjective sense
1. gnarled, gnarly, knotted, knotty, knobbed
used of old persons or old trees covered with knobs or knots
"gnarled and knotted hands"
"a knobbed stick"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License