• 夫妻ふさい — married couple
• 良妻りょうさい — good wife
• 新妻にいづま — newlywed wife
• 内妻ないさい — common-law wife
• 正妻せいさい — lawful wife

妻 is associated with a woman in a marital role in classical usage. In modern Japanese it straightforwardly means “wife,” and appears in polite or legal compounds referring to spouses and households.

妻つまと 一緒いっしょに 旅行りょこうしました。
I traveled with my wife.

彼かれの 妻つまは 優やさしい 人ひとです。
His wife is a kind person.