Bassen synger dypt.

Because -en is the definite singular ending for many Norwegian nouns.

• bass = a bass / bass
• bassen = the bass

So bassen means the bass. In context, that could mean the bass singer, the bass voice, or sometimes the bass part/instrument, depending on what is being talked about.

The dictionary form is bass.

You will often learn Norwegian nouns in their indefinite singular form, for example:

• en bass = a bass
• bassen = the bass

So if you look this word up, you would look for bass.

It can refer to a few related things:

• a bass singer
• a bass voice
• the bass part in music
• sometimes a bass instrument in context

In a sentence like Bassen synger dypt, the most natural interpretation is usually the bass singer sings deeply / in a deep voice.

Synger is the present tense of the verb å synge = to sing.

Examples:

• jeg synger = I sing / I am singing
• du synger = you sing / you are singing
• bassen synger = the bass sings / is singing

Norwegian present tense does not change by person, so the verb stays synger with I, you, he, we, etc.

It can mean either one, depending on context.

Norwegian often uses the simple present where English may use either:

• sings
• is singing

So Bassen synger dypt could mean:

• The bass sings deeply
• The bass is singing deeply

The surrounding context tells you which is more natural.

Because dypt is the form used here as an adverb.

• dyp = deep as an adjective
• dypt = deeply / in a deep way

Compare:

• en dyp stemme = a deep voice
  Here dyp describes the noun stemme.
• han synger dypt = he sings deeply / in a deep voice
  Here dypt describes how he sings.

So in this sentence, dypt modifies the verb synger, not a noun.

Not always. It can also be the neuter adjective form of dyp.

For example:

• et dypt hav = a deep sea
  Here dypt is an adjective agreeing with a neuter noun.
• hun pustet dypt = she breathed deeply
  Here dypt is an adverb.

In Bassen synger dypt, it is functioning as an adverb.

No, this is a very normal Norwegian sentence pattern:

• Subject + verb + adverb

So:

• Bassen = subject
• synger = verb
• dypt = adverb

This is the same basic order you would expect in a simple statement.

You could, but it would sound poetic, marked, or stylistically unusual in ordinary conversation.

The neutral version is:

• Bassen synger dypt.

If you move dypt to the front, Norwegian word order requires inversion:

• Dypt synger bassen.

That is grammatically possible, but much less neutral.

Because Norwegian usually puts the definite article at the end of the noun instead of using a separate word before it.

So:

• en bass = a bass
• bassen = the bass

This is one of the first big differences English speakers notice in Norwegian.

The tricky part is the vowel y, which does not exist in normal English pronunciation.

A rough guide:

• y is a rounded front vowel.
  It is somewhat like saying ee while rounding your lips.
• dypt ends with a clear pt cluster.

So dypt is approximately düpt, but that is only a rough hint. The real Norwegian y is worth practicing separately.

A rough pronunciation is BAHSS-en, with the stress on the first syllable.

Things to notice:

• the a is a short a
• the ss gives a clear s sound
• -en is the definite ending

So the word is basically bass + en spoken together.

Yes, it is grammatical and understandable, but it sounds a bit literary, musical, or context-dependent rather than like a very everyday sentence.

It feels most natural in a context such as:

• talking about a choir or soloist
• describing a singer’s voice
• discussing a musical performance

In ordinary speech, people might also say something more explicit, such as:

• Bassen synger med dyp stemme. = The bass sings with a deep voice.
• Han synger dypt. = He sings in a deep register.

It depends on context.

Dypt can mean things like:

• deeply in a physical or spatial sense
• deeply in sound or tone
• deeply / profoundly in a more abstract sense

In Bassen synger dypt, the most likely meaning is about low/deep vocal tone, not emotion.

It is normally a common-gender noun:

• en bass
• bassen

That is why the definite singular form ends in -en rather than -et.

Yes, that is a very natural interpretation.

Even if the English translation says sings deeply, the Norwegian sentence strongly suggests singing in a deep/low register or with a deep tone. So in real use, many speakers would understand it as something like:

• The bass sings in a deep voice
• The bass sings low

The exact nuance depends on context.