暗礁 [－－]

Jyutping am3 ziu1
Pinyin àn jiāo

Definitions (CC-CEDICT)
  1. submerged reef (rock)
Definitions (粵典–words.hk)
  1. 名詞
    冇​露出​海面​嘅​礁石​。
    submerged rocks, reefs
Definitions (Wiktionary)
  1. noun, figuratively
    unseen obstacle
  2. noun, literally
    submerged reef
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）