cause
cause (causa)
the event or reason that makes something else happen; it answers the question why?
Example
Because the road flooded, the school closed. (The flooded road is the cause.)
In Spanish
cause (causa) — el suceso o la razón que hace que ocurra otra cosa; responde a la pregunta ¿por qué?
Because the road flooded, the school closed. (La calle inundada es la causa.)