What is the part of speech achtung?

"Achtung" is a German word, and its part of speech depends on how it's used in a sentence:

* Interjection: When used alone, "Achtung!" is an interjection meaning "attention!" or "look out!"

* Noun: It can also be used as a noun, meaning "attention" or "caution."

For example:

* Interjection: "Achtung! The train is coming!"

* Noun: "The soldier shouted 'Achtung!'" (meaning "attention")

It's important to note that "Achtung" is rarely used in English.