The kanji 礁 generally refers to "reef" or "rocky reef." It specifically describes a submerged or partially submerged rock formation, often found in the ocean. This character evokes images of underwater environments and the hazards or natural habitats associated with these formations.

・On-yomi (音読み): ショウ (shō) ・Kun-yomi (訓読み): いそ (iso) - meaning "reef" or "rocky shore"

⚫︎ サンゴ礁 Translation: coral reef ⚫︎ 暗礁 Translation: hidden reef, sunken rock (metaphorically: a dangerous situation) ⚫︎ 礁湖 Translation: lagoon (a body of shallow water separated from the sea by a reef or sandbank)

The kanji 礁 is a phono-semantic compound (形声文字, keisei moji). The left side is the radical 石 (ishi), meaning "stone" or "rock," indicating the meaning. The right side is 焦 (shō), which functions as a phonetic component, giving a clue to the pronunciation. Therefore, the character was formed by combining the meaning of "stone/rock" and the sound of "shō" to represent a reef which is made of rocks.