How do you say US in Greenlandic?

There is no direct translation for "US" in Greenlandic, as the language doesn't have a specific word for a country. Instead, you would use the Greenlandic translation for the "United States of America", which is:

Amerikanske Forenede Stater

This literally translates to "American United States".

However, in informal conversation, you might use the shortened version:

Amerikak

which translates to "America".