Translate の意味は？

The moon is called “tsuki” in Japanese.

tsuki
月

I need to know the context in which you are using “fearless,” but if you are just saying someone is fearless, you can say like this.

osore o shiranai
恐れを知らない

This phrase is not an adjective like “fearless.” It means “not know fear,” and it is how people in Japan would usually say “fearless.” If you are looking for an adjective, I would recommend this one.

daitan-futeki
大胆不敵

It should be followed by “desu” or “da” to finish the sentence.