Word decomposition
The deeper explanation is that the distance from the surface to the bottom or from the outside to the inside is large, as opposed to "shallow": deep water. Deep mountains. Very deep. Abyss and deep valley. Deep sea. Deep ploughing and deep breathing. Hiding things deep is empty (hiding precious things as if there is nothing, which means that people have knowledge and talent but don't show them in front of others). Seclusion. On the surface, the eternal water flows forever: "Rivers flow forever." Forever: forever. Eternal life is meaningful. A day forever (a long day). Yongnian (a. the whole year; B. Long life). Forever. Never forget. Immortality In ancient times, it was described by poetry, just like "chanting". Radical: water.