inmostin‧most /ˈɪnməʊst $ -moʊst/ adjective [only before noun] 
1your inmost feelings, desires etc are your most personal and secret ones: 
In his inmost heart, he knew he didn’t love me.2formal furthest inside a place, and so difficult to see or find: Apparently there are bats in the inmost caves.
1your inmost feelings, desires etc are your most personal and secret ones: In his inmost heart, he knew he didn’t love me.2formal furthest inside a place, and so difficult to see or find: Apparently there are bats in the inmost caves.