ライフパートナー

noun

life partner

Refers to a long-term romantic or domestic partner, often in contexts such as same-sex relationships or non-marital partnerships.

• 彼かの女じょは長なが年ねん連つれ添そったライフパートナーと一いっ緒しょに暮くらしている。

  She lives with her life partner of many years.