How to Say "treacherous" in Spanish
The most common Spanish word for “treacherous” is “peligrosas” — use 'peligrosas' (or 'peligroso' in its singular masculine form) to describe paths, roads, conditions, or situations that are physically dangerous or risky..
peligrosas
/peh-lee-GROH-sahs//pe.li.ˈɣɾo.sas/

Examples
Ten cuidado, esas calles son muy peligrosas de noche.
Be careful, those streets are very dangerous at night.
Las serpientes de esta región no son peligrosas.
The snakes in this region are not dangerous.
Estamos tomando decisiones muy peligrosas para el futuro.
We are making very risky decisions for the future.
Matching with Feminine Words
Use this specific form when you are talking about more than one feminine thing (like 'las ideas' or 'las cajas'). The -as ending matches the feminine plural group.
Where to Put the Word
In Spanish, you usually put this word after the thing you are describing, such as 'olas peligrosas' (dangerous waves).
Using the wrong ending
Mistake: “Los perros son peligrosas.”
Correction: Los perros son peligrosos. Use 'peligrosas' ONLY for groups that are entirely feminine.
traidora
trah-EE-dor/tɾaˈiðoɾ/

Examples
La memoria es traidora cuando uno intenta recordar detalles viejos.
Memory is treacherous/deceitful when one tries to recall old details.
Tuvimos que cruzar un camino traidor lleno de hielo.
We had to cross a treacherous path full of ice.
Adjective Agreement
Like all Spanish adjectives, 'traidor' must match the gender and number of the noun it describes: 'camino traidor' (m. singular) but 'sonrisa traidora' (f. singular).
traidores
/trai-DOR-es//tɾajˈðoɾes/

Examples
Sus actos traidores fueron descubiertos rápidamente.
Their treacherous acts were quickly discovered.
Tengan cuidado con esos pensamientos traidores.
Be careful with those deceptive thoughts.
Describing Nouns
Since this is the plural form, it must match the plural noun it describes (e.g., 'hombres traidores' or 'planes traidores').
Dangerous Paths vs. Deceitful Things
Related Translations
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