Kennarinn útskýrir skrefið vel.

The ending -inn is the definite article attached to the noun. Icelandic usually puts the at the end of the noun instead of using a separate word.

• kennari = teacher
• kennarinn = the teacher

So Kennarinn means the teacher.

Because Icelandic commonly uses a suffixed definite article. Instead of saying a separate word like English the, Icelandic often adds an ending to the noun itself.

In this sentence:

• Kennarinn = the teacher
• skrefið = the step

That is completely normal Icelandic.

útskýrir is the present tense, 3rd person singular form of útskýra (to explain).

So:

• að útskýra = to explain
• hann/hún/það útskýrir = he/she/it explains

Here the subject is Kennarinn (the teacher), which is singular, so útskýrir is the correct form.

Yes. Kennarinn is the subject, the person doing the action.

The sentence breaks down like this:

• Kennarinn = subject
• útskýrir = verb
• skrefið = direct object
• vel = adverb

So the structure is basically:

The teacher + explains + the step + well

Because skrefið means the step, while skref means just step or a step depending on context.

• skref = step / a step
• skrefið = the step

So the sentence is talking about a specific step, not just any step.

Here skrefið is the direct object, so it is in the accusative case.

A useful thing to know is that for many neuter nouns, the nominative and accusative forms are often the same. So even though skrefið is accusative here, it looks the same as nominative skrefið.

That can be confusing for learners, but it is very common in Icelandic.

Because vel is an adverb, and it modifies the verb útskýrir (explains).

• vel = well
• góður/góð/gott = good

English works the same way:

• The teacher explains the step well.
• not The teacher explains the step good.

So vel is correct because it describes how the teacher explains.

Yes. Kennarinn útskýrir skrefið vel is a very natural, standard word order.

It follows the common pattern:

• subject
• verb
• object
• adverb

So:

Kennarinn | útskýrir | skrefið | vel

Icelandic main clauses also usually follow the verb-second principle, meaning the finite verb tends to come early in the sentence. This sentence fits that pattern nicely.

Sometimes yes, but the version here is the most neutral and natural.

Kennarinn útskýrir skrefið vel sounds straightforward and idiomatic. Moving vel can change the emphasis and may sound more marked or less natural, especially for a beginner.

So as a learner, this is a good pattern to copy: subject + verb + object + vel

Not usually as a separate article in ordinary sentences. Icelandic often uses the bare noun where English would use a/an.

So:

• kennari can mean teacher or a teacher
• skref can mean step or a step
• kennarinn = the teacher
• skrefið = the step

That means Icelandic marks definiteness much more clearly than indefiniteness.

A rough English-friendly approximation is oot-SKEE-rir.

A few helpful points:

• ú sounds roughly like oo
• ý sounds like ee
• the word is related to út
  • skýra, so the tsk cluster can feel tricky at first

You do not need a perfect accent right away; just getting close to oot-SKEE-rir is a good start.

The accent marks are part of the spelling and usually show a specific vowel sound.

In modern Icelandic:

• ú is a different vowel from plain u
• ý is pronounced the same as í in modern speech

So the accents are important and should not be ignored when reading or writing the word. They are not optional decoration; they are part of the language.