also: チョンアンちんぼつじけん
noun
sinking of the South Korean navy ship Cheonan
Refers to the 2010 incident in which the ROKS Cheonan was sunk, allegedly by a North Korean torpedo. Used in news and historical contexts.
天安沈没事件は2010年3月26日に発生した。
The Cheonan sinking incident occurred on March 26, 2010.
天安沈没事件の原因については様々な見解がある。
There are various views on the cause of the Cheonan sinking incident.
Compound of 天安 (Cheonan, from Korean 천안) + 沈没 (sinking) + 事件 (incident).