lunatic

The story

1. Latin · derived fromluna“moon”
2. Late Latin · derived fromlunaticus“moonstruck”
3. Old French · derived fromlunatique
4. Middle English · inherited fromlunatik
5. English todaylunatic

From Middle English lunatik, from Old French lunatique, from Late Latin lunaticus (“moonstruck”), derived from Latin luna (“moon”), the connection stemming from the belief that changes of the moon caused intermittent insanity.

Words from the same roots