In or into the interior of.
The side or part that is within.
Contents.
In or into the interior; within.
Interior; internal.
There is naught more that can be done inside. – Peggy Owen and Liberty by Lucy Foster Madison
All the women he saw except only his wife and his mother- in- law were like the girl he had taken inside himself. – The Best Short Stories of 1921 and the Yearbook of the American Short Story by Various