Ballen er blå.

Ballen is the definite form of ball, meaning the ball.

In Norwegian, instead of usually putting a separate word for the in front of the noun, you often add the definiteness to the end of the noun:

• en ball = a ball
• ballen = the ball

So Ballen er blå means The ball is blue.

The ending -en marks the noun as definite singular for many masculine nouns.

Here, ball is a masculine noun, so:

• en ball = a ball
• ballen = the ball

This is a very common pattern in Norwegian.

Because Norwegian often expresses the by adding an ending to the noun.

In English:

• the ball

In Norwegian:

• ballen

That ending already contains the idea of the. So you do not say den ballen here unless you specifically need a demonstrative-like meaning such as that ball or extra emphasis in certain structures.

Er means is.

It is the present tense of the verb å være = to be.

Examples:

• Jeg er = I am
• Du er = you are
• Ballen er blå = The ball is blue

Unlike English, Norwegian does not change the present-tense form of this verb depending on the subject. So er is used with many different subjects.

In this sentence, blå is an adjective describing the noun through the verb er, so it is a predicate adjective.

With predicate adjectives in Norwegian, the form often depends on the gender and number of the noun:

• Ballen er blå = The ball is blue
• Huset er blått = The house is blue
• Bilene er blå = The cars are blue

Here, ballen is singular and not neuter, so blå is the correct form.

Yes. Blått is used with a neuter singular noun.

Compare:

• En ball er blå = A ball is blue
• Et hus er blått = A house is blue

So the adjective changes depending on the noun it describes. Since ball is not a neuter noun, you use blå, not blått.

Yes, in this simple sentence it is very similar to English:

• Ballen = subject
• er = verb
• blå = adjective/complement

So the pattern is:

Subject + verb + adjective

That makes Ballen er blå very straightforward for an English speaker.

A rough guide for an English speaker is:

• Ballen ≈ BAHL-len
• er ≈ a short ehr or sometimes weaker depending on dialect
• blå ≈ blaw with an o/aw-like vowel

A few helpful notes:

• The a in ballen is not like the English a in day.
• The letter å in blå is important. It sounds somewhat like the vowel in law for many learners as a rough approximation.
• Norwegian pronunciation varies by dialect, so exact pronunciation can differ.

It is capitalized because it is the first word of the sentence, not because nouns are always capitalized.

Unlike German, Norwegian does not capitalize all nouns.

So:

• Ballen er blå.
• Jeg ser ballen.

In the second sentence, ballen is not capitalized because it is not at the beginning.

The indefinite version is:

En ball er blå. = A ball is blue.

Compare:

• en ball = a ball
• ballen = the ball

So the sentence changes depending on whether you mean a ball or the ball.

Yes, but that means It is blue or That one is blue, depending on context.

• Ballen er blå. = The ball is blue.
• Den er blå. = It is blue.

So den replaces the noun instead of naming it directly. You would use it when it is already clear what object you are talking about.