1. the state or quality of being uncertain; lack of certainty or confidence
Usage: less common than ‘uncertainty’

Examples

• The uncertainness in her voice revealed her doubts about the plan.
• There was an air of uncertainness surrounding the project’s future.
• His uncertainness about the decision was evident to everyone.
• The uncertainness of the weather made planning difficult.
• She spoke with uncertainness when asked about her career goals.
• The uncertainness of the situation left them feeling anxious.