noun
sexual relations; sexual relationship
A formal or clinical term for sexual relations or a sexual relationship. Often used in legal, medical, or official contexts.
性的関係を持つ前に、お互いの同意を確認することが大切です。
Before having sexual relations, it is important to confirm mutual consent.
彼らは長年にわたって性的関係を続けていた。
They had maintained a sexual relationship for many years.