Tungan mín er enn heit af kaffinu.

Tungan is the noun tunga with the suffixed definite article, so it means the tongue.

• tunga = tongue
• tungan = the tongue

Icelandic usually adds the to the end of the noun instead of using a separate word like English does.

In this sentence, tungan mín means my tongue.

In Icelandic, possessive words like mín often come after the noun, especially when the noun is already definite.

So:

• tungan mín = my tongue
• literally: the tongue my

This is a very normal Icelandic pattern. Putting the possessive after the noun often sounds more neutral and natural in everyday language.

A form like mín tunga is possible, but it is usually more emphatic, contrastive, or stylistically marked.

Mín is the feminine singular nominative form of minn (my).

It matches tungan, which is:

• feminine
• singular
• nominative

So the agreement is:

• tungan = feminine singular nominative
• mín = feminine singular nominative

This kind of agreement is very important in Icelandic.

The adjective heitur (hot) changes form to agree with the noun it describes.

Since tungan is feminine singular, the adjective must also be feminine singular:

• masculine: heitur
• feminine: heit
• neuter: heitt

So:

• tungan er heit = the tongue is hot

Enn means still in this sentence.

So er enn heit means is still hot.

It often refers to something continuing from before until now. In other contexts, enn can also mean yet, depending on the sentence.

That is a normal word order in Icelandic.

In a sentence with vera (to be) plus an adjective, an adverb like enn often comes between the verb and the adjective:

• er enn heit = is still hot

So the structure is:

• subject: Tungan mín
• verb: er
• adverb: enn
• adjective: heit

This is very natural Icelandic word order.

Here af means something like from or because of.

So heit af kaffinu means hot from the coffee or hot because of the coffee.

This use of af expresses cause or source.

Because af takes the dative case, and kaffi has to change into its dative form.

The noun is:

• kaffi = coffee

After af, it becomes dative. With the definite article, the form is:

• kaffinu = the coffee in the dative singular

So:

• af kaffinu = from the coffee

Yes. The ending -nu here includes the definite article.

So:

• kaffi = coffee
• kaffið = the coffee (nominative/accusative)
• kaffinu = the coffee (dative)

Because af requires dative, Icelandic uses kaffinu in this sentence.

In English, we might simply say from the coffee or sometimes just from coffee, but Icelandic grammar makes the case ending visible.

Yes, tunga can mean both tongue and language, depending on context.

For example:

• body part: Tungan mín er heit.
• language-related use can appear in other contexts

In this sentence, it clearly means the physical tongue, because of heit af kaffinu.

Yes, very common. It follows a basic and useful pattern:

• [noun phrase] + er + [adverb] + [adjective] + [prepositional phrase]

Here that gives:

• Tungan mín = subject
• er = is
• enn = still
• heit = hot
• af kaffinu = from the coffee

This is a good model for making similar sentences.

You could, but it would mean something different in emphasis.

• Tungan mín = my tongue as a normal noun phrase
• Tungan er mín = the tongue is mine

So Tungan er mín sounds contrastive or emphatic, as if you are distinguishing it from someone else’s.

For the meaning in your sentence, Tungan mín is the natural choice.

The dictionary forms are:

• tunga = tongue
• minn = my
• vera = to be
• enn = still
• heitur = hot
• af = from, off, by, because of
• kaffi = coffee

This is useful because many of the words in the sentence appear in changed forms:

• tungan comes from tunga
• mín comes from minn
• er comes from vera
• heit comes from heitur
• kaffinu comes from kaffi