This is the 7214th most frequent Chinese word.
維爾
"維爾" (Wéi'ěr) is a transliteration often used for the name "Will" or "Ville."
In this sentence, 維爾 is used as a proper noun, representing a person's name.
維爾今天去了圖書館。
Wei Er went to the library today.
Here, 維爾 is again a name and refers to an individual whose philosophies are discussed.
這本書介紹了維爾的生活哲學。
This book introduces Wei Er's philosophy of life.
In this usage, 維爾 designates a fictitious name within a story or movie context.