Learn Danish: Chefens besked er ikke vigtig. - The boss's message is not important.

In Danish, you add the possessive -s to the exact form of the word you want to use. Because we are saying "the boss's" (and not "a boss's"), we take the definite form chefen (the boss) and add an -s to the end. Notice that Danish does not use an apostrophe here!

Wait, why is it Chefens besked and not Chefens beskeden if we mean "the message"?

When a noun is owned by someone using an -s ending, the owned word must always be in the indefinite form. Even though it means "the boss's message" in English, Danish grammar requires the basic form besked right after the owner.

Why doesn't the adjective vigtig end with a -t here?

Adjectives must match the gender of the noun they describe. The word for message is an "en" word (en besked). Because it is a singular "en" word, the adjective vigtig (important) stays in its base form without an extra -t at the end.

Why does ikke come after the verb er?

In a standard Danish main sentence, the verb must be in the second position. The adverb ikke (not) generally comes right after the main verb. So we say er ikke just like we say "is not" in English.