Internal (adjective)

1. Situated or occurring within the body or an organism, especially the human body.
2. Relating to the inner workings of an organization, company, or country, especially those concerned with management or administration.

Origin:

Late middle english: from latin internus "inside, internal", from in- "in" + ternus "of the three parts".

Examples:

1. The internal organs are protected by the ribcage.
2. She suffered from internal bleeding and had to be hospitalized.
3. The company is undergoing internal restructuring.
4. Internal memos revealed the extent of the corruption.
5. The country's internal politics have been stable for years.