precipice (n.)
"steep face of rock," 1630s, from Middle French précipice, from Latin praecipitium "a steep place," literally "a fall or leap," from praeceps (genitive praecipitis) "steep, headlong, headfirst," from prae "before, forth" (see pre-) + caput "head" (see head (n.)). Earlier in English as a verb (1590s) meaning "fall to great depth."