From inter- +‎ link.

interlink (third-person singular simple present interlinks, present participle interlinking, simple past and past participle interlinked)

1. (intransitive) To link together.
2. (transitive) To link (two or more things) together.

• (to link two or more things together): affix, attach, join, put together; see also Thesaurus:join

interlink (plural interlinks)

1. A link of this kind.