1. the quality of being eager to know or learn something; curiosity.
Usage: uncountable; typically positive connotation
2. excessive interest in other people's affairs; nosiness.
Usage: uncountable; often negative connotation

Examples

• Her inquisitiveness about science led her to pursue a career in research.
• The child's inquisitiveness was evident in the endless stream of questions.
• His inquisitiveness about his neighbor's personal life crossed the line into rudeness.
• Teachers often encourage inquisitiveness in the classroom to promote learning.
• The detective's inquisitiveness helped solve the case.
• She displayed remarkable inquisitiveness, always wanting to understand how things worked.