dangerously
Ya entonces, estaba peligrosamente trastornado.
Even then, he was dangerously disturbed.
— Psicosis (1960)
Estuvimos peligrosamente cerca de morirnos congelados.
We were dangerously close to freezing to death.
Este prototipo de coche es peligrosamente poco fiable.
This prototype car is dangerously unreliable.