This is the 5475th most frequent Japanese word.
ぅぅぅうううう
"ぅぅぅうううう" is not a standard Japanese word; it typically represents a drawn-out sound or emotional expression like whining, groaning, or hesitation.
In this sentence, 'ぅぅぅうううう' represents a vocalized, prolonged sigh or groan that conveys the speaker's exhaustion.
ぅぅぅうううう、今日はとても疲れた。
Uuuu, I'm really tired today.
Here, 'ぅぅぅうううう' expresses a deep feeling of disappointment, used interjectionally to convey emotion.
彼は試験に失敗して、『ぅぅぅうううう』と嘆いた。
He failed the exam and let out a prolonged 'uuuuu' of lament.
The word 'ぅぅぅうううう' illustrates involuntary vocal expressions associated with physical sensations, in this case, shivering from cold.