When you are smart, level-headed and able to understand and assess a situation, this is an example of having a lot of common sense.
Origin of common-sense
- Translation of Latin sēnsus commūnis common feelings of humanity
From American Heritage Dictionary of the English Language, 5th Edition
- After Latin sensus communis, Ancient Greek κοινὴ αἴσθησις (koinē aisthēsis).