I didn't dare to
I didn't dare look.
Pero, como era su cumpleaños, no me atreví a decirle que no.
But, since it was her birthday, I didn't dare say no to her.
— Todo sobre mi madre (1999)
Es que no me atreví a interrumpir.
It's just that I didn't dare to interrupt.
— Mujeres al borde de un ataque de nervios (1988)
I didn’t dare do it.