What does くよくよ mean?
くよくよ is a Japanese verb meaning “to fret (over); to brood (about); to mope; to worry” in English. It can also be translated as “worriedly” depending on context. It is written as くよくよ in hiragana, and kuyokuyo in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
彼は過去の失敗の事をくよくよ思っている。
He dwells on his past failures.