Denshi Jisho — Online Japanese dictionary

おく interior; inner part; inside
Common word, Noun 
ひおう secrets; mysteries
Noun 
やまおく mountain recesses
Common word, Noun, No-adjective 
うんおう mysteries
Noun 
うんのう mysteries
Noun 
おおおく inner palace (in Edo Castle); palace's ladies chambers; shogun's harem
Noun 
しんおう esoteric doctrines; mysteries
Na-adjective, Noun 
どうおう secret knowledge; interior of a temple
Noun 
ないおう inner part; depths
Noun 
なかおく area of the Edo castle where the shogun would work and spend his daily life
Noun 
きょうおう one's heart of hearts; the depths of one's mind
Noun 
森の もりのおく deep in the forest
Noun 
心の こころのおく inner heart
Noun 

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