innermost or essential
"the inner logic of Cubism"
"the internal contradictions of the theory"
"the intimate structure of matter"
"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.
inside the country
"the British Home Office has broader responsibilities than the United States Department of the Interior"
"the nation's internal politics"
occurring within an institution or community
"intragroup squabbling within the corporation"
happening or arising or located within some limits or especially surface
"internal mechanism of a toy"
"internal party maneuvering"