This is the 7150th most frequent Japanese word.
ワイシャツ
A dress shirt.
Here, 'ワイシャツ' (dress shirt) is used to refer to a formal, often white, shirt commonly worn in professional settings.
彼は仕事のために白いワイシャツを着ています。
He is wearing a white dress shirt for work.
In this sentence, 'ワイシャツ' (dress shirt) is mentioned as an item of clothing requiring care (ironing) to look presentable.
昨日、ワイシャツにアイロンをかけるのを忘れました。
I forgot to iron the dress shirt yesterday.
The word 'ワイシャツ' is used in a shopping context to indicate the product (dress shirts) being discussed, emphasizing its availability and price.