(1) a blackthorn topped with a two-humped gnarl(2) Chism's second installation, Heaven, Hell and the Garden, offered a glimpse of a fleshy gnarl of cloth through a trap door as you mounted a low platform to admire a tall painting of sturdy underbrush.(3) And because of its knots and gnarls it's worth even less at the chip-mill than plantation wood.(4) Lady Peacemaker was surprised to find herself looking into the eyes of a human face composed entirely from the bumps and gnarls of the tree's trunk.