Usage Note
Peligroso follows standard -o/-a agreement: un barrio peligroso, una curva peligrosa. It derives from peligro (danger), so sin peligro means 'safely'. The construction es peligroso + infinitive ('it is dangerous to...') is a common learner pattern worth memorising.
Examples
"Este camino es muy peligroso de noche."
Natural Translation
This road is very dangerous at night.
Literal Translation
This road is very dangerous of night.

Free starter pack
Building your Spanish vocabulary?
Get the 100 most common Spanish words as a free PDF — one email, no spam.
Related Words
Explore Spanish by topic