disjoint

The story

1. Latin · derived fromdisiungō
2. Old French · derived fromdesjoindre“disjoin”
3. Middle English · inherited fromdisjoynen
4. English todaydisjoint

From Middle English disjoynen, from Old French desjoindre (“disjoin”), from Latin disiungō, from dis- + iungō (“join”).

Words from the same roots