inter-, intero-

(Latin: between; among, mutually, together; on the inside, internal)

Although abstracted from the many compounds in which it entered English, the form inter- was not generally considered a living prefix in English until the 1400s.

During the later period of Middle English many words borrowed in the Old and Middle French forms entre-, enter- began to be consciously respelled with Latin inter-; although vestiges of the older French borrowings are found in entertain and enterprise.

The living prefix inter- is now freely added to almost any element in English to create such formations with the meaning of "between" and "among". The words formed by intra- are closely related to this inter- prefix; in fact, they both apparently came from the same Latin source.

—Based on information from Barnhart Dictionary of Etymology
inter-mural, intermural; intramural
inter-mural, intermural (in tuhr MYOOR uhl) (adjective)
Describing the involvement of participants between two or more educational institutions, athletic clubs, or other groups; literally, "between the walls": There were friendly inter-mural debates scheduled among the rival schools.
intramural (in truh MYOOR uhl) (adjective)
Concerning something which exists or is carried on within the bounds of an institution; especially, a school, athletic club, or a group; literally, "within the walls": Kevin signed up to play intramural soccer at his school.

The winner of the intramural sports competition at each of the universities then played an inter-mural game to determine the overall championship.

internal ophthalmopathy
Any disease of the internal structures of the eyeball or eyeballs.
internal ophthalmoplegia, ophthalmoplegia interna
Paralysis affecting only the sphincter muscle (ringlike band of muscle fibers) of the eye pupil and the ciliary muscle (smooth muscle).
internal reference electrode
In chemistry, the metal electrode inside all chemical-sensing potentiometric (voltage-measuring) electrodes.
international (adjective), more international, mostinternational
1. Relating to, or involving two or more countries: An international commission or an international cooperation.
2. A reference to extending across or transcending the boundaries of nations: The tennis champion had an international fame.

International mostly means something; such as a company, a language, or an organization that involves more than a single country.

international, intranational
international (in" tuhr NASH uh nuhl, in" tuhr NASH nuhl) (adjective)
Relating to or consisting of two or more independent countries: Virginia went to school to study international commerce.
intranational (in" truh NASH uh nuhl; in" truh NASH nuhl) (adjective)
Relating to something which exists or occurs within the boundaries of a single country, rather than involving different sovereign states: Voting for the President of the United States is an intranational event and so participation by other nations is not permitted.

The outcome of the intranational elections in the country had international implications for trade and commerce.

internationalism (s) (noun), internationalisms (pl)
Multiple countries working together on common issues: Internationalism can be a political movement that advocates greater economic and political cooperation among nations.
internationalist (s) (noun), internationalists (pl)
internationalization (s) (noun), internationalizations (pl)
The process of bringing something under the control of certain countries.

Related "together" units: com-; greg-; struct-.

Cross references of word families related directly, or indirectly, to: "internal organs, entrails, inside": ent-; enter-; fistul-; incret-; intra-; splanchn-; viscer-.