The word 澄澈 is formed by combining the characters 澄 and 澈, both meaning clear or transparent, specifically regarding water. Each character contains the water radical (氵) on the left, denoting their relation to liquid clarity. 澄 uses 登 primarily for phonetic indication, while 澈 incorporates 徹 for phonetic and semantic elements, suggesting thoroughness. Together, they reinforce the concept of clarity through semantic repetition.