treacherous
US /ˈtretʃ.ɚ.əs/
UK /ˈtretʃ.ɚ.əs/

1.
traicionero, pérfido
guilty of or involving betrayal or deception
:
•
He was accused of being a treacherous spy.
Fue acusado de ser un espía traicionero.
•
The politician's actions were seen as treacherous by his former allies.
Las acciones del político fueron consideradas traicioneras por sus antiguos aliados.
2.
traicionero, peligroso
presenting hidden or unpredictable dangers
:
•
The mountain pass was treacherous in winter.
El paso de montaña era traicionero en invierno.
•
The icy roads were treacherous for drivers.
Las carreteras heladas eran traicioneras para los conductores.