technical
adj.— «In trail racing parlance, mud, roots and rocks on the trail are described as a “technical” trail. » —“SRTs again…“ Hungry Ghost’s Daily Diet (Canada) July 30, 2007. (source: Double-Tongued Dictionary)
Further reading
If you speak a second or third language, you may remember the first time you dreamed in that new tongue. But does this milestone mean you’re actually fluent? And a couple’s dispute over the word regret: Say you wish you’d been able...