Deeply or keenly (emotionally or in degree); severely or completely.
彼の失敗をつくづく悔やんでいる。
I deeply regret his failure.
最近つくづく自分の健康が心配だ。
Lately I am very worried about my health.
この映画を見てつくづく感動した。
I was deeply moved by this movie.
Intently or carefully; paying close attention or thinking something over thoroughly.
問題の原因をつくづく考えてから答えを出した。
I thought deeply about the cause of the problem before giving an answer.
説明をつくづく聞いて理解した。
I listened carefully to the explanation and understood.
古い写真をつくづく眺めて昔を思い出した。
I looked intently at old photos and remembered the past.