The phrase "a less curious" is correct and usable in written English.
It can be used when comparing the curiosity levels of two subjects, indicating that one is not as curious as the other.
Example: "In the discussion, she seemed a less curious participant compared to her peers who were eager to ask questions."
Alternatives: "not as curious" or "less inquisitive".
"I did not know many of my friends as well as I do now…I was a less interesting person, and a less curious one".
A less curious usage wouldn't make the corruption in Afghanistan less gaudy, or our mission there less misty — or less mystifying.
I am a less curious, less capable consumer of news than I was ten or twenty years ago, when the stakes were lower.
As Egyptology and archaeology evolved, the destructive practise came to an end, but it didn't mean researchers and the public were any less curious about what lies within a mummy.
Their authors aren't any less curious about the wider world, but they tend to be nest builders, not vagabonds.
After being discovered, they conveniently disappeared, likely relocating to a town with less curious reporters.
No less curious is a punch bowl presented to an English shipyard owner in the 1780s.
If Aelfgyva and the cleric were just sitting on a bench, people might have been less curious; but he is stretching his arm toward her face in a way that seems possessive, or violent, or both.
No less curious is the third movement, a faster-tempo episode in the nature of a scherzo.
"You can [punish] them every time they ask a question, but can you really make them less curious?" Many of the cities on the list also sway politically liberal, in stark contrast to the areas around them.
After one hour a day of use, children and teens who spent more time on screens were lower in psychological well-being: They were less curious and more easily distracted, and had a more difficult time making friends, managing their anger and finishing tasks.
