lie behind
US /laɪ bɪˈhaɪnd/
UK /laɪ bɪˈhaɪnd/

1.
estar detrás de, ser la razón de
to be the real reason or explanation for something
:
•
The true motives lie behind his sudden resignation.
Los verdaderos motivos se esconden detrás de su repentina renuncia.
•
What lies behind their decision to move?
¿Qué hay detrás de su decisión de mudarse?