to be filled with overwhelming emotion; to feel deeply moved to an extent that is hard to express
今日の成功に感慨無量だ。
I am deeply moved by today's success.
父の遺品を見て、感慨無量になった。
Seeing my father's belongings filled me with deep emotion.
引退式で彼は感慨無量の面持ちだった。
At the retirement ceremony, he looked deeply moved.