1. in a manner showing disappointment, sadness, or loss of confidence or pride
Usage: adverb form of crestfallen; commonly used to describe how someone speaks, acts, or responds after experiencing defeat or letdown

Examples

• She crestfallenly admitted that she had failed the exam.
• He walked crestfallenly out of the audition after forgetting his lines.
• The team returned crestfallenly to the locker room after losing the championship.
• She spoke crestfallenly about her rejection from the university.
• He crestfallenly accepted the criticism from his coach.
• The candidate crestfallenly withdrew from the race.
• They crestfallenly realized their plan would not work.