This is the 9658th most frequent Japanese word.
自慢
Pride or boasting.
In this sentence, '自慢' is used as a verb to indicate boasting or showing off with pride, which can be perceived either positively or negatively depending on the context.
彼は自分の作品を友人たちに自慢していました。
He was boasting about his work to his friends.
Here, '自慢する' is used to mean actively taking pride to an extent that it becomes evident to others, often signaling over-confidence.
自分の成功を自慢することは時に逆効果になることがあります。
Boasting about one's own success can sometimes be counterproductive.
In this case, '自慢の' acts as a descriptor emphasizing pride over a skill or attribute, used positively to denote something worthy of admiration.