How do you spell sir in Russian?

The Russian word for "sir" depends on the context and level of formality:

Formal:

* Господин (Gospodin) - This is the most common and formal way to address a man. It literally translates to "gentleman" or "master".

Informal:

* Сэр (Ser) - This is a direct borrowing from English and is used in informal situations, often jokingly or with a slight air of mockery.

Other options:

* Мужчина (Muzhchina) - This means "man" and can be used as a less formal way to address a man.

* Господин Иванов (Gospodin Ivanov) - Adding the man's last name makes the address more respectful and formal.

The best choice depends on the specific situation and your relationship with the person you're addressing.