Learn these common climbing terms and you just might avoid an embarrassing situation if you’re asked to “flash.”AreteAn outside corner on a rock face, like corners of a pyramid.ButtressA rock formation that projects out from the main face or cliff.ChimneyA wide crack usually big enough to fit the climber’s entire body inside.CruxThe most difficult portion of a climb. Usually, the crux is a single move or a short sequence of moves.DihedralWhere two walls meet to form an inside corner.FlashTo successfully send a route the first time without practicing itLeadingSending a sport or trad route first, either placing protection as you go or clipping in to existing bolts. The level of risk is higher when leading, as you’re not automatically anchored to the rock.PitchThe distance climbed with one length of rope. Climbs can be single-pitch or multi-pitch. Table Rock, N.C. is famous for its multi-pitch routes (600 feet long), whereas Sunset Rock, Tenn., is known for its single-pitch routes (less than 80 feet).ProblemA bouldering term, meaning the path the climber takes to complete the climb. A bouldering problem is the equivalent of a climbing route.SendTo successfully complete, or “ascend,” a route.