curiosity · noun /ˌkjʊr.iːˈɑs.ət̬.i/Full view
B2 U the feeling of wanting to know or learn about something
Dictionary examples:

My curiosity got the better of me and I opened the envelope.

Just out of curiosity, how did you get my address?

Learner example:

When the warrior had left, [he] explored the cave out of curiosity and [to] his big surprise [he] found the treasure. (First Certificate in English; B2; Greek)

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