Nantoka/암초amcho암초 (amcho) is a Korean word meaning “rock; reef; snag”.Meanings1rock2reef3snag4deadlockPart of speechnounHanja暗礁Related words암기learning by heart암기력memory암흑기dark age암호cryptograph암시hint암암리being secretly암담하다gloomy암갈색dark brown암거래black-market dealings암거래상black marketeer암기하다learn by heart암행어사amhaeng-eosaStudy Korean with flashcards →