This is the 5736th most frequent Japanese word.
つぶやく
To mutter or to tweet (post on Twitter).
Here, "つぶやいた" expresses the act of quietly muttering or speaking under one's breath, emphasizing solitude and a soft tone.
彼は独り言のように静かにつぶやいた。
He muttered quietly as if talking to himself.
In this sentence, "つぶやいて" is used to describe softly speaking or reflecting on past events, showcasing internal contemplation.
彼女は眠る前に楽しい一日をつぶやいて思い出した。
She recalled and muttered about the pleasant day before going to sleep.
Here, "つぶやく" refers to an ongoing habit of softly expressing words under one's breath, highlighting personality tendencies.