Adjectives

(s)inner, interior, internallocated inward“Beethoven's manuscript looks like a bloody record of a tremendous inner battle” (Leonard Bernstein), “she thinks she has no soul, no interior life, but the truth is that she has no access to it” (David Denby), “an internal sense of rightousness” (A.R.Gurney,Jr.)
(a)innerlocated or occurring within or closer to a center“an inner room”
(s)inner, internal, intimateinnermost or essential“the inner logic of Cubism”, “the internal contradictions of the theory”, “the intimate structure of matter”
(s)inside, inner, privilegedconfined to an exclusive group“privy to inner knowledge”, “inside information”, “privileged information”
(s)innerexclusive to a center; especially a center of influence“inner regions of the organization”, “inner circles of government”
(s)innerinside or closer to the inside of the body“the inner ear”