interfix

Noun

1. An empty morph inserted between two morphemes in the process of word formation, such as English -i- and -o-.
2. A transfix.
3. (dated) An association link.

Verb

1. (transitive) To attach or anchor (two or more parts) together.
2. (transitive) To insert (an interfix) between two morphemes.

Etymology

From inter- + fix.