Origin: Latin suffix -ous
Dangerous has 3 different meanings across 1 category:
Full of danger.
"The storm surge made the coastline a dangerous place to walk near the water's edge."
In plain English: Dangerous means something that is likely to cause harm or injury.
"The old bridge is dangerous because its planks are rotting away."
Usage: Use dangerous to describe anything that poses a real threat of harm or injury to people or property. It applies to situations, objects, animals, or behaviors where there is a significant risk of causing damage.
The word dangerous comes from the Old French dangereus, which originally meant threatening or fraught with peril. It entered Middle English as a compound of "danger" and "-ous," eventually replacing an older native term that simply meant free or bold.