expression, godan verb (-ru)
chuckle with delight; congratulate oneself
Rare, literary expression describing a self-satisfied, delighted reaction, often with a nuance of smugness or self-congratulation.
彼は自分の成功に恐悦がっているようだった。
He seemed to be chuckling with delight at his own success.
その知らせを聞いて、彼
Upon hearing the news, she inwardly congratulated herself.