己妻

己(おの)妻(づま) • (onozuma) 

1. (Classical Japanese, obsolete) one’s spouse, mate; wife, husband
   • c. 759, Man’yōshū:

     暮(ゆふ)名寸尓(なぎに)　求食(あさり)為(する)鶴(たづ)　塩(しほ)満(みて)者(ば)　奥(おき)浪(なみ)高(たか)三(み)　己(おの)妻(づま)喚(よばふ) [Man'yōgana]

     夕(ゆふ)なぎに　あさりする鶴(たづ)　潮(しほ)満(み)てば　沖波(おきなみ)高(たか)み　己(おの)妻(づま)呼(よ)ばふ [Modern spelling]

     <Yupunagi₁ ni asari suru tadu sipo mi₁te ba oki₁nami₁ takami₁ ono₂duma yo₁bapu>
     → Yūnagi ni asari suru tazu shio mite ba okinami takami onozuma yobau

     In the evening calm, a crane looking for feed; when the high tide comes, offshore waves will rise, and he will call out his mate.

• 人妻(ひとづま) (hitozuma, “someone else's wife”)