I Chinghexagram 29, depicted :|::|: is named 坎 (kan3), Gorge. Other translations: R. Wilhelm/C. Baynes, The Abysmal (Water); E. Shaughnessy (Mawangdui), Repeated Entrapment.
Inner (lower) trigram is ☵ (:|: 坎 kan3) Gorge = (水) water
Outer (upper) trigram is ☵ (:|: 坎 kan3) Gorge = (水) water