conjunction

Conjunction comes from Old French conjonction, which came from Latin coniūnctiō, meaning "joining." That noun grew from the verb coniungere, "to join."

The word has carried the sense of "joining" from its Latin root straight through Old French into English, without the facts here showing any shift in meaning along the way.

It shares its root coniungere, "to join," with any English word built on that same joining idea, though the facts don't name a specific cognate.