gratis

1. ADV If something is done or provided gratis, it does not have to be paid for. 免费地[ADV after v]

David gives the first consultation gratis. 戴维免费提供第一次咨询。

2. ADJ Gratis is also an adjective. 免费的

What I did for you was free, gratis, you understand?

我为你所做的都是免费的、不收钱的，你明白吗？