U+7901 "礁" CJK Unified Ideograph-# Unicode Character
U+7901 "礁" CJK Unified Ideograph-# is a Chinese character that primarily means "reef" or "rock" in a maritime or geological context, often referring to a submerged or partially exposed ridge of rock, coral, or sand near the surface of water that poses a hazard to navigation. It belongs to the CJK (Chinese, Japanese, Korean) unified ideographs block and is composed of the radical "石" (stone) on the left, indicating its association with rock or mineral elements, and the phonetic component "焦" on the right, which contributes to its pronunciation (jiāo in Mandarin). This character is commonly used in coastal geography, navigation warnings, and metaphorical expressions, such as in the compound "暗礁" (dark reef or hidden reef) to describe an unseen obstacle.