奥

Etymology
Despite the apparent overlap with the modern goon reading of oku that is derived from 🇨🇬, this term is actually rooted in, appearing in the  collection of poetry dating to roughly 759 CE. Cognate with, originally in reference to “somewhere far removed, possibly out of sight”. While oki came to mean “far removed in the wide open → far off shore”, oku instead came to mean “far removed inside → inside, interior”.

Noun

 * 1) inside; inner depths
 * 2) back, rear
 * 3) inside the house
 * 4) one's heart, true feelings
 * 1) inside the house
 * 2) one's heart, true feelings

Derived terms

 * : to have a deep recess, to be deeply recessed, to have a deep interior