洗あらいっこ

noun, noun or participle which takes 'suru'

washing each other; scrubbing each other

Refers to the reciprocal action of washing someone else's body, often used in contexts like bathing with a partner or child. The 〜っこ suffix adds a casual, mutual nuance.

• お風ふ呂ろで子こどもと洗あらいっこするのが楽たのしい。

  It's fun to wash each other with my child in the bath.

• 背せ中なかを洗あらいっこしよう。

  Let's scrub each other's backs.