internal
UK: ɪnˈtɜːnəl | US: ɪnˈtɜːrnəl
adj. situated or existing within something
adj. relating to the inside of the body
adj. belonging to or dependent on a nation or organization (e.g., internal affairs)
The word "internal" derives from Latin internus ("inward, internal"), which itself comes from inter ("between, within"). The suffix -al (from Latin -alis) forms adjectives meaning "pertaining to." Over time, "internal" evolved in Middle English to describe things situated inside or inherent to a system, body, or organization. The morpheme inter- preserves its core meaning of "within," while -nal solidifies its adjectival function.
The doctor examined her for internal injuries after the accident.
The company’s internal policies prohibit sharing confidential data.
She struggled with internal conflicts about her career choice.
The medicine is designed for internal use only.
The audit revealed several internal inefficiencies in the department.