1. in a way that shows uncertainty or lack of confidence
2. in a way that expresses doubt or suspicion

Examples

• She looked at him doubtfully when he promised to be on time.
• The student answered doubtfully, unsure if his response was correct.
• He examined the old map doubtfully, wondering if it was accurate.
• The witness testified doubtfully about what she had seen that night.
• The teacher nodded doubtfully at the student’s unusual excuse.
• She doubtfully agreed to the risky plan, still having reservations.