難しいですな。いい質問です。。。頑張ります。 We usually use "interest" to describe a general or broad area, and "curious" to describe something more specific. It's case-by-case of course. In many sentences you could use either word. Also, "curious" implies lack of knowledge - you don't know something, and want to know. "Interest" could mean you already know a lot about something (eg. if it is your hobby). 例えば： I have an interest in soccer. (サッカーは趣味です。） I am interested in movies. （映画が好きです。） だけど： I am curious as to where he is now. (彼はどこかな？分かりたいです。） I am curious about how electricity works. よく、ほとんど同じ意味です。例えば： I am curious about biology; I want to study it next year. I am interested in biology; I want to study it next year. I hope that helps!

What is the difference between interested and curious? I would say that curiosity comes before interest. I might be attracted to something because I was curious, and then I could become interested.

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Thank you for your answer to my question everyone!!

There is a saying in English "Curiosity killed the cat!" being too curious can get you in trouble. I am interested in learning a new language. I am curious to see what is behind the locked door.