belay (buh-LAY)—in climbing, to secure a rope to the climber and to a person on the ground so that the climber does not fall
equipment (i-KWIP-muhnt)—the tools needed for a particular purpose
experience (ek-SPEER-ee-uhnss)—skill or knowledge
harness (HAR-niss)—an arrangement of straps worn around the body to keep someone safe
hold (HOHLD)—something that is grabbed or held on to for support
muscles (MUHSS-uhlz)—the parts of your body that produce movement
rappel (rah-PEL)—to climb down a vertical surface using a rope
surface (SUR-fiss)—the outside or outermost layer of something
unnecessary (uhn-NESS-uh-ser-ee)—not needed
vertical (VER-tuh-kuhl)—upright, or straight up and down