/ˈɪnərmoʊst/
in·ner·most
BrE /ˈɪnəməʊst/
NAmE /ˈɪnərmoʊst/
[only before noun]
(also less frequent in·most)
most private, personal and secret
I could not express my innermost feelings to anyone.
nearest to the centre or inside of sth
the innermost shrine of the temple
OPP outermost