合ごう衾きん

noun, noun or participle which takes 'suru'

sleeping together; sharing a bed

Literary or euphemistic term for two people sleeping together, often implying a sexual relationship. Rare in everyday conversation; more common words include 同衾 (どうきん) or simply 一緒に寝る.

• 二人ふたりは合ごう衾きんの仲なかになった。

  The two became intimate (literally, came to share a bed).