What did the mountain climber name his son?

Behind the Groan

A Name With a Steep Side

A cliff is a steep, high face of rock—the kind of terrain a mountain climber may encounter. Cliff is also a familiar given name. The question sounds as though it wants an ordinary name, but the answer supplies one connected directly to the father's activity. Pause briefly after the question and give “Cliff” without extra explanation; the shared meaning should do all the work.