This is the 3221st most frequent Japanese word.
夜会
"夜会" (yakai) means "night party" or "evening gathering."
In this sentence, '夜会' is used to refer to a formal evening gathering or reception, which is a common context for the term.
彼女は昨夜の夜会で素敵なドレスを着ていました。
She wore a beautiful dress at last night's evening social gathering.
Here, '夜会' is utilized to denote an evening event, specifically a formal or festive one requiring preparation.
夜会の準備が大変だったけれど、成功したので良かったです。
The preparations for the evening ball were challenging, but I'm glad it was successful.
In this case, '夜会' describes a conceptual or thematic representation of a formal evening, as depicted in the drama.