Welcome

Literally

well-come / a welcome to you

When to use it

Use to receive someone arriving, a guest at your door, an audience at an event, a visitor to a place. It is a formal, slightly elevated word, so it fits hosting, signage, ceremonies, and written invitations more than casual chats with close friends.

How it feels

Formal, warm, a touch literary. Never sarcastic.

Formality

Formal