turbulent water
澎 centers on water in violent motion: turbulent, surging, or splashing water. The meaning is closely tied to the sound and image of water crashing or roaring.
澎 combines the water radical 氵 with 彭, which likely contributes both sound and the idea of a bursting or surging force. The exact historical development of 彭 is uncertain, but the combination suggests water that swells or crashes.
The water radical 氵 beside 彭, which resembles a drum being struck with decorative lines, suggests water pounding and splashing like a drumbeat: turbulent water.
For ホウ, imagine a huge wave (ホウ) crashing against the shore with a loud 'hou' sound, like the roar of turbulent water.
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as the sound of surging water