inmostinnermost[adjective]Synonyms: deepest, basic, central, essential, intimate, personal, private, secret
[TahlilGaran] English Synonym Dictionary ▲
in‧most /ˈɪnməʊst $ -moʊst/
adjective [only before noun]1. your inmost feelings, desires etc are your most personal and secret ones:
In his inmost heart, he knew he didn’t love me.2. formal furthest inside a place, and so difficult to see or find:
Apparently there are bats in the inmost caves. [TahlilGaran] Dictionary of Contemporary English ▲