How to Say "weird" in Spanish
The most common Spanish word for “weird” is “raro” — use 'raro' when describing something that is unusual, odd, or even eccentric, often with a slightly more informal or personal feel, like a strange dream or an odd coincidence..
raro
/RRA-roh//ˈra.ɾo/

Examples
Tuve un sueño muy raro anoche.
I had a very strange dream last night.
Mi vecino es un tipo un poco raro, casi nunca habla.
My neighbor is a bit of a weird guy, he almost never speaks.
¡Qué raro! Pensé que había dejado mis llaves aquí.
How strange! I thought I had left my keys here.
Matching the Noun
Like most describing words in Spanish, 'raro' changes to match the person or thing it describes. Use 'raro' for masculine things, 'rara' for feminine, 'raros' for masculine plural, and 'raras' for feminine plural. (e.g., 'un libro raro', 'una película rara').
Ser vs. Estar: Is it a trait or a temporary state?
Use 'ser raro' to say someone or something has a strange personality or nature (it's who they are). Use 'estar raro' to say someone is acting strangely right now (it's how they are).
Steak that's 'Rare'
Mistake: “Quiero mi bistec raro, por favor.”
Correction: This sounds like you want a 'strange steak'! To say you want meat that's not cooked much, use 'poco hecho'. For example: 'Quiero mi bistec poco hecho, por favor.'
extraño
Examples
Vi algo extraño en el cielo anoche.
I saw something strange in the sky last night.
'Raro' vs. 'Extraño': Which to Choose?
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