Mér er illt í hálsinum, svo ég drekk heitt te.

Because Icelandic often uses an impersonal construction for physical sensations like pain, cold, hunger, and so on.

So Mér er illt literally works like To me, it is painful / bad.

• mér = to me in the dative
• er = is
• illt = painful / bad

This is different from English, where we usually say I have a sore throat or my throat hurts.

If you said Ég er illur, that would not mean I am in pain. It would mean something more like I am bad / evil / nasty / angry, depending on context.

In expressions like Mér er illt, Icelandic uses the adjective in the neuter singular because there is no normal grammatical subject.

This happens in a lot of impersonal expressions:

• Mér er kalt = I am cold
• Mér er illt = I am in pain / It hurts
• Mér er heitt = I am hot

So illt is not agreeing with mér. It is just the default neuter singular form used in this type of sentence.

Here illt means painful, sore, or hurting, not morally bad.

The adjective illur / ill / illt can mean bad in some contexts, but in expressions about health or bodily pain it often means:

• painful
• sore
• hurting

So Mér er illt í hálsinum means that your throat hurts.

Because í means in here, and when it expresses location, it takes the dative case.

The noun is:

• háls = throat, neck

Its dative singular is:

• hálsi

And with the suffixed definite article -num, it becomes:

• hálsinum = the throat

So:

• í hálsinum = in the throat

Icelandic often uses the definite body part without a possessive when the owner is already clear from context.

Since mér already tells us who is affected, hálsinum naturally means my throat here.

So Icelandic prefers:

• Mér er illt í hálsinum

rather than something more explicit like:

• Mér er illt í hálsi mínum

The version with mínum is possible, but it usually sounds more emphatic or less natural in ordinary speech.

Yes. Háls can mean both neck and throat, depending on context.

In this sentence, because of illt í hálsinum and the idea of drinking hot tea, the meaning is clearly throat.

So context tells you which meaning is intended.

Here svo means so, therefore, or that’s why.

It links the two parts of the sentence:

• Mér er illt í hálsinum = My throat hurts
• svo ég drekk heitt te = so I drink hot tea

Be aware that svo can mean different things in other contexts, such as then, as, or so very, but here it is a connector meaning so / therefore.

Because drekka is the infinitive meaning to drink, while drekk is the 1st person singular present tense: I drink.

Present tense of drekka:

• ég drekk = I drink
• þú drekkur = you drink
• hann/hún/það drekkur = he/she/it drinks

So in the sentence, ég drekk is the correct finite verb form.

Because heitt has to agree with te.

• te is a neuter noun
• after drekka, it is the object
• here it is singular and indefinite

So the adjective heitur becomes:

• heitt for neuter singular

That gives:

• heitt te = hot tea

This is normal adjective agreement in Icelandic.

It is in the accusative, because it is the direct object of drekka.

The verb drekka takes an object, and that object is usually in the accusative:

• ég drekk te = I drink tea
• ég drekk kaffi = I drink coffee

With te, the accusative singular looks the same as the nominative, so there is no visible change in the noun itself. But grammatically, it is accusative.

Not really as a natural equivalent.

Icelandic usually expresses this idea with patterns like:

• Mér er illt í hálsinum = My throat hurts
• Ég er með hálsbólgu = I have a sore throat / throat inflammation

A phrase like Ég er með illan háls would sound odd or unnatural to most speakers.

So for this situation, Mér er illt í hálsinum is the natural pattern to learn.

Yes, but this word order is completely normal.

The clause after svo here is a regular main-clause-style continuation:

• svo ég drekk heitt te

with:

• ég = subject
• drekk = verb
• heitt te = object

You may also see other causal connectors in Icelandic, such as þess vegna, which often trigger slightly different word order patterns. But with this sentence, svo ég drekk heitt te is straightforward and natural.

It is closer in structure and feeling to My throat hurts.

More literally, it is something like:

• To me, it is painful in the throat

Natural English translations could be:

• My throat hurts, so I drink hot tea
• I have a sore throat, so I drink hot tea

So even if the English meaning shown to you is I have a sore throat, the Icelandic grammar is built differently.