expression
water and fish; close relationship
Used in the set phrase 水魚の交わり to describe an inseparable, harmonious relationship, like fish and water. Rarely used outside this idiom.
See also: 水魚の交わり
「水魚の交わり」という言葉は、切っても切れない親しい関係を表す。
The phrase 水魚の交わり describes an inseparable, close relationship.