Most German nouns have one gender, but some have two and there’s a difference in meaning. One example is Schild.
der Schild is the shield in the sense of what knights would use as defense.
das Schild is the German word for the sign, in the sense of a sign that stands somewhere with something written on it. That can be a traffic sign but also a price tag at a mall. The origin of this meaning is probably the fact that back in the day, people would often paint their house’s on their defensive shield.
If you want to read more about the family of Schild and how it relates to English, you can check out this article on YourDailyGerman: