Here's how it breaks down:
* Bem: means "well" or "good"
* Vindo: means "coming"
So, "bem-vindo" literally translates to "well-coming," which is a way of saying "welcome."
Here are some examples of how to use it:
* "Bem-vindo à minha casa!" (Welcome to my house!)
* "Bem-vindos ao Brasil!" (Welcome to Brazil!)
* "Seja bem-vindo!" (Welcome!)
You can also use the more formal "seja bem-vindo/a" for a more polite and formal greeting.