noun, noun or participle which takes 'suru', intransitive verb
adultery; illicit sexual relations
Refers to secret sexual relations, especially adultery. Often used in historical or legal contexts.
江戸時代には密通は重罪だった。
In the Edo period, adultery was a serious crime.
彼は人妻と密通
He was rumored to have had an illicit affair with a married woman.
noun, noun or participle which takes 'suru', intransitive verb
secret communication; collusion
Used for clandestine communication, especially with an enemy or outsider. Can imply treasonous contact.
敵と密通した疑いで逮捕された。
He was arrested on suspicion of secret communication with the enemy.
密通が発覚して外交問題になった。
The secret communication was exposed and became a diplomatic issue.