• 妻つま — wife
• 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 a pictographic character representing a woman with a hair ornament, holding her hair in place — a symbol of a partner in traditional marriage. It conveys affection, familial duty, and household connection.

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.

The on-yomi “サイ” is mostly used in compound words like 夫妻ふさい or 良妻りょうさい. The kun-yomi “つま” is commonly used in everyday conversation to refer to one's wife.