behind their back
Tiene una gran responsabilidad a sus espaldas.
He has a great responsibility on his shoulders.
— El hundimiento (2004)
Él siempre habla mal de su padre a sus espaldas.
He always talks badly about his father behind his back.
Se la hicieron, y le dieron un tiro a sus espaldas.
They set him up and shot him in the back.
— Cidade dos Homens (2007)
La gente solía reírse de él a sus espaldas.
People used to laugh at him behind his back.
Nunca hables mal de los demás a sus espaldas.
Never speak ill of others behind their backs.
Tom habló de María a sus espaldas.
Tom talked about Maria behind her back.
Poco sabía él de lo que ocurría a sus espaldas.
Little did he know what was happening behind his back.
Es Cristo con una cruz llamada cáncer a sus espaldas.
It is Christ with a cross called cancer on his back.
— Vivir (1952)
No debes hablar de la gente a sus espaldas.
You shouldn't talk about people behind their backs.
No quería que pensara que nos estábamos viendo a sus espaldas.
I didn't want her to think we were seeing each other behind her back.
— Control (2007)