開かい襟きんシャツ

noun

open-necked shirt

A shirt with an open collar, worn without a tie. Common in casual and business-casual settings.

• 夏なつは開かい襟きんシャツを着きて出しゅっ勤きんする人ひとも多おおい。

  In summer, many people go to work wearing an open-necked shirt.