Serving to connect other things together.

linkage

present participle of link

plural of linking

simple past tense and past participle of link in

(transitive, sometimes figuratively) to connect in a useful or meaningful way

Containing links.

The part of a system that is most likely to fail or cause problems.

A string with clips on each end to hold socks together as a pair before placing them in the wash.

(Internet) An element of text on a web page, used to access other web pages.