Ég heyri þig vel.

Because þig is the object form of þú.

In Ég heyri þig vel, the speaker is doing the hearing, so ég is the subject. The person being heard is the object, so Icelandic uses þig, not þú.

A quick comparison:

• þú = you as the subject
• þig = you as the object

So:

• Þú heyrir mig. = You hear me.
• Ég heyri þig. = I hear you.

Heyra is the dictionary form (the infinitive), meaning to hear.
Heyri is the form used with ég (I) in the present tense.

So the verb changes depending on the subject:

• ég heyri = I hear
• þú heyrir = you hear
• hann/hún/það heyrir = he/she/it hears

This is a normal feature of Icelandic verbs: they often change form according to person and number.

Vel means well.

In this sentence, it describes how the hearing is happening, so it works like an adverb:

• Ég heyri þig. = I hear you.
• Ég heyri þig vel. = I hear you well.

In natural English, this is often translated as I can hear you clearly or I hear you fine, depending on context.

Because vel is an adverb, while góður / góð / gott are adjectives.

Here, we need a word that modifies the verb heyri (hear), not a noun. Icelandic usually uses vel when English uses well.

Compare:

• Hann syngur vel. = He sings well.
• Þetta er gott. = This is good.

So in Ég heyri þig vel, vel is correct because it describes the action of hearing.

Yes, it is completely natural.

It is especially common when talking on the phone, in a video call, or when checking whether the sound is clear. It can mean things like:

• I hear you well
• I can hear you clearly
• I hear you fine

Depending on tone and situation, it may sound slightly more direct than some English equivalents, but it is perfectly idiomatic.

Yes. Icelandic often uses the simple present where English may prefer can + verb.

So:

• Ég heyri þig. can mean I hear you or I can hear you
• Ég heyri þig vel. can mean I hear you well or I can hear you clearly

This is very common. The ability meaning is often understood from context, especially in practical situations like checking audio.

The letter þ is like the th in thin, not the th in this.

A rough guide:

• þig sounds approximately like thig
• the g at the end is not always pronounced like a strong English g; in normal speech it can be softer

For an English speaker, the safest approximation is something like thihg with the th from thin.

The important point is:

• þ = voiceless th as in think

A rough pronunciation guide is HAY-ri.

A few points:

• hey- sounds somewhat like hey
• the r is usually a tapped or trilled Icelandic r, not an English r
• the ending -i is like a short i sound

So an English-friendly approximation is HAY-ri, though the real Icelandic pronunciation will sound sharper and more fronted.

This is the normal basic Icelandic word order:

• Ég = subject
• heyri = verb
• þig = object
• vel = adverb

So it follows a familiar pattern:

Subject + Verb + Object + Adverb

That said, Icelandic word order can move around more than English in some contexts, especially for emphasis. But this sentence is the most neutral and straightforward version.

This is a very common question.

• heyra = to hear
• hlusta = to listen

So:

• Ég heyri þig. = I hear you.
• Ég hlusta á þig. = I am listening to you.

The first is about perceiving sound.
The second is about actively paying attention.

Also notice that hlusta usually takes á:

• hlusta á tónlist = listen to music

Yes, absolutely.

• Ég heyri þig. = I hear you / I can hear you
• Ég heyri þig vel. = I hear you well / clearly

Adding vel makes it more specific: not only do you hear the person, but you hear them clearly or without difficulty.

Yes, in standard Icelandic spelling it does.

• ég = I

The accent mark is part of the correct written form. Icelandic spelling treats accented vowels as distinct letters, not just optional marks.

So you should write:

• Ég heyri þig vel.

not:

• Eg heyri þig vel.

It is neutral and works in both formal and informal contexts.

Because Icelandic uses þú-based forms in many ordinary situations, Ég heyri þig vel is not especially casual. It can be used with friends, coworkers, customer support, or anyone you address with þú.

If the situation calls for the polite pronoun þér, the sentence would change, but in modern everyday Icelandic, þú is very common.