English You’re welcomeA polite acknowledgement of another's expression of gratitude.

In English, we can casually acknowledge another person's *thank you* by saying "Don't worry about it", "No problem", "Don't mention it", or "It's nothing", but the formal acknowledgement is: "You're welcome." Welcome isn't used as an empty adjective like this in any other way, other than this phrase. You can be welcome to join a party, or welcome in someone's home, but when someone says thank you, and the response is "You're welcome", there's no answer to what they're welcome to do. They're just... welcome.