1. most twisted, knotted, or rough in appearance
Usage: superlative form of gnarled
2. most difficult, challenging, or problematic
Usage: informal
3. most excellent or impressive
Usage: slang; especially in surfing and skateboarding

Examples

• The gnarliest tree in the forest had branches twisted in impossible directions.
• That old oak has the gnarliest bark I’ve ever seen.
• This is the gnarliest math problem on the entire test.
• The gnarliest part of the hike was climbing over those fallen logs.
• Dude, that was the gnarliest wave I’ve ever surfed!
• She pulled off the gnarliest skateboard trick at the competition.
• The gnarliest roots made it difficult to walk through the woods.