How to Say "loony" in Spanish
The Spanish word for “loony” is “lunático” — B1 level.
Examples
Tu hermano tiene una idea lunática para ganar dinero.
Your brother has a crazy idea to make money.
No seas lunático, no podemos saltar desde aquí.
Don't be crazy, we can't jump from here.
Ese comportamiento lunático asustó a los vecinos.
That eccentric behavior scared the neighbors.
Matching the Person
When describing a woman, the 'o' at the end changes to an 'a' (lunática). If describing a group, add an 's' (lunáticos or lunáticas).
Using with 'Ser' vs 'Estar'
Use 'ser' if the person is generally eccentric, but use 'estar' if they are acting crazy at this specific moment.
Confusing with the Moon
Mistake: “Using 'lunático' to mean 'moonlit'.”
Correction: Use 'iluminado por la luna' for moonlit. 'Lunático' almost always refers to behavior, not the moon's light.
Learn Spanish with Inklingo
Interactive stories, personalized learning, and more.