gnar
Gnar is a slang term primarily used in skateboarding, snowboarding, and surfing culture. It refers to something that is difficult, dangerous, or challenging, often in a way that is intimidating or requires significant skill and bravery to overcome. The term can be applied to a steep and treacherous slope, a complex trick, or a particularly gnarly wave.
The origin of the word is somewhat unclear, but it is believed to have emerged from surf
While "gnar" denotes difficulty, it is generally used with a positive or admiring connotation within these communities.