1. the quality or habit of talking with excessive pride about one’s achievements, possessions, or abilities

Examples

• His constant boastfulness about his wealth made him unpopular with his colleagues.
• The athlete’s boastfulness overshadowed her genuine talent.
• She tried to hide her boastfulness when discussing her academic achievements.
• The coach warned the team that boastfulness could lead to overconfidence.
• His boastfulness was really just a way to mask his insecurity.
• The novel’s protagonist struggles with boastfulness and pride throughout the story.