Answer: innermost

AnswerCrossword Clue
INNERMOSTCentral
INNERMOSTSuperlatively secret
INNERMOSTClosest to the center.
INNERMOSTDeepest in from the edge.
INNERMOSTDeepest.
innermostFurthest in; closest to the center
innermostfarthest in / an innermost thing
innermost(of thoughts or feelings) Most private and deeply felt