秘ひ奥おうひおうMeanings1nounsecrets; mysteries; hidden depthsRefers to profound, hidden truths or esoteric knowledge, often in spiritual, artistic, or technical contexts. Somewhat literary.彼かれは武ぶ道どうの秘ひ奥おうを極きわめるために修しゅ行ぎょうを続つづけた。