also: さいおく
noun
deep inside; innermost part
Refers to the deepest, most interior part of a physical space, such as a building, cave, or forest. Often used in literary or descriptive contexts.
洞窟の最奥には小さな祠があった。
At the innermost part of the cave, there was a small shrine.
彼は屋敷の最奥の部屋に住んでいた。
He lived in the innermost room of the mansion.
Compound of 最 (sai, 'most') and 奥 (ou/oku, 'interior'). The reading さいおう is the standard on'yomi combination; さいおく is a variant reading.