not safe
Pero no es seguro que llueva en una semana.
But it’s not certain that it will rain in a week.
— El manantial de las colinas (1986)
No le voy a dejar ir porque no es seguro.
I'm not going to let him go because it's not safe.
— Un lugar en ninguna parte (1988)
It's not safe here.
It's not certain whether he'll come or not.
Mira, pensamos que este lugar no es seguro.
Look, we think this place isn't safe.