Bananen är alldeles övermogen.

Bananen is the definite form of banan, so it means the banana.

• en banan = a banana
• bananen = the banana

In Swedish, the definite article is often added as an ending to the noun instead of being a separate word like the in English.

In Swedish, nouns have two grammatical genders: en-words and ett-words.

Banan is an en-word, so you say:

• en banan
• bananen

This is something you usually have to learn together with each noun. There is not always a clear logical reason.

Är means is. It is the present tense of vara = to be.

So:

• bananen är ... = the banana is ...

Some other forms of vara are:

• är = is / are
• var = was
• varit = been

Here, alldeles is an adverb that strengthens the adjective övermogen. In this sentence it means something like:

• completely
• quite
• really
• totally

So alldeles övermogen gives the sense that the banana is really/completely overripe.

Depending on context, alldeles can have slightly different shades of meaning in Swedish, so it does not always map to just one English word.

Övermogen is made from:

• över- = over-
• mogen = ripe

So övermogen means overripe.

This is a common kind of Swedish word formation, where prefixes are added to make new meanings.

The adjective form depends on the noun it describes.

Here, bananen is:

• common gender (en-word)
• singular
• definite

For a common-gender singular noun used with är, the basic adjective form is used:

• Bananen är övermogen.

Compare:

• Ett äpple är övermoget. = An apple is overripe.
• Bananen är övermogen. = The banana is overripe.
• Bananerna är övermogna. = The bananas are overripe.

So -t is used with ett-words, and -a is often used in plural and many definite contexts.

This is a very good question, because Swedish adjective agreement can be tricky.

When an adjective comes before a definite noun, you usually use -a:

• den övermogna bananen = the overripe banana

But in a sentence with är where the adjective comes after the noun, Swedish often uses the form that matches gender and number:

• Bananen är övermogen.

So:

• den övermogna bananen
  but
• bananen är övermogen

This difference between attributive use (before the noun) and predicative use (after är, blir, etc.) is very important in Swedish.

This is a basic Swedish statement with the normal word order:

• Subject: Bananen
• Verb: är
• Adverb: alldeles
• Adjective/complement: övermogen

So the pattern is:

subject + verb + adverb + adjective

This is very common in Swedish:

• Huset är väldigt stort. = The house is very big.
• Kaffet är för varmt. = The coffee is too hot.

Because alldeles modifies the adjective övermogen.

Just like in English you say:

• very ripe
• completely overripe

Swedish puts the adverb before the adjective:

• alldeles övermogen

This is standard word order for adverbs modifying adjectives.

A rough pronunciation guide is:

• bananen ≈ bah-NAH-nen

The stress is usually on the second syllable:

• ba-NA-nen

A few notes:

• Swedish a is usually a broader vowel than in English.
• The final -en is pronounced clearly, not silent.

A more careful phonetic approximation would be something like [baˈnɑːnɛn].

A rough guide is:

• övermogen ≈ UR-ver-moo-gen or EU-ver-moo-gen

The first vowel ö does not exist exactly in standard English, so learners often need practice with it.

Stress is usually on the first syllable:

• Ö-ver-mogen

A rough IPA version is something like [ˈøːvɛrˌmuːɡɛn].

Do not worry if your ö is not perfect at first; it is a very common challenge for English speakers.

Yes. Bananen är övermogen is a completely natural sentence and means The banana is overripe.

Adding alldeles just makes it stronger:

• Bananen är övermogen. = The banana is overripe.
• Bananen är alldeles övermogen. = The banana is completely/really overripe.

Yes. Some common Swedish words that strengthen adjectives are:

• väldigt = very
• mycket = very / much
• helt = completely
• riktigt = really
• ganska = quite / fairly

Examples:

• Bananen är väldigt mogen. = The banana is very ripe.
• Bananen är helt övermogen. = The banana is completely overripe.
• Bananen är ganska mogen. = The banana is quite ripe.

But alldeles övermogen sounds very natural for something that has gone too far in ripeness.

Yes, depending on context, it can suggest that the banana is not just overripe but really overripe, so far too ripe may be a natural English translation in some situations.

However, the exact sense comes from the context:

• övermogen already means too ripe / overripe
• alldeles intensifies that meaning

So the sentence carries the idea that the banana has clearly passed the ideal stage of ripeness.