What does つくづく mean?
つくづく is a Japanese adverb meaning “completely, really” in English. It can also be translated as “intently” depending on context. It is written as つくづく in hiragana, and tsukuzuku in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
彼は、自分の不幸をつくづく考えた。
He brooded over his misfortunes.