Az optikus kiveszi a lencsét.

Hungarian has two forms of the definite article:

• a before a consonant sound
• az before a vowel sound

Because optikus begins with the vowel o, the correct form is az optikus.

Compare:

• a lencse = the lens
• az optikus = the optician

This is similar to English a / an.

Optikus means optician.

In this sentence, it is the subject: the person doing the action.

Hungarian nouns do not change form for the subject in a basic sentence, so optikus stays just optikus.

Kiveszi comes from:

• ki = out
• vesz = take
• together: kivesz = take out
• kiveszi = he/she/it takes it/them out in the definite conjugation

The dictionary form you will usually learn is the infinitive:

• kivenni = to take out

So the sentence uses a finite verb form of kivenni / kivesz.

This is a very important Hungarian grammar point.

Hungarian verbs often have two kinds of present-tense forms:

• indefinite conjugation
• definite conjugation

Here, the object is a lencsét = the lens, which is definite. Because the object is definite, the verb also appears in the definite form:

• kivesz = takes out something indefinite / no definite object
• kiveszi = takes out the/it

So:

• Kivesz egy lencsét. = He/She takes out a lens.
• Kiveszi a lencsét. = He/She takes out the lens.

Because it is the direct object of the verb.

In Hungarian, the direct object usually gets the accusative ending -t.

Base form:

• lencse = lens

Object form:

• lencsét = lens as the thing being acted on

With many nouns ending in -a or -e, that final vowel becomes long before the accusative ending:

• lencse → lencsét
• mese → mesét
• alma → almát

So a lencsét means the lens as the object of takes out.

Hungarian often does not use subject pronouns unless they are needed for emphasis or contrast.

In this sentence, the subject is already explicitly stated:

• Az optikus = The optician

So there is no need to add a pronoun like he or she.

Also, Hungarian does not force you to mark gender in this kind of sentence. Kiveszi can mean:

• he takes it out
• she takes it out
• it takes it out

The noun optikus tells you who the subject is, but not grammatical gender.

The sentence has a very normal, neutral word order:

• Az optikus = topic / subject
• kiveszi = verb
• a lencsét = object

So this is a straightforward The optician takes out the lens type of structure.

Hungarian word order is more flexible than English, but the neutral order here is perfectly natural.

Yes. Hungarian word order is flexible, but changing it usually changes the focus or emphasis.

For example:

• Az optikus kiveszi a lencsét.
  Neutral statement.

• A lencsét veszi ki az optikus.
  More emphasis on the lens: it is the lens that the optician is taking out.

• Az optikus a lencsét veszi ki.
  Also gives special focus to a lencsét.

So Hungarian word order is not random: it often reflects information structure, not just grammar.

The infinitive is:

• kivenni = to take out

You may also meet the 3rd person singular base form:

• kivesz = he/she takes out or takes out with an indefinite object

This relationship is common in Hungarian:

• infinitive: kivenni
• present stem: kivesz
• definite 3rd singular: kiveszi

A rough English-friendly guide is:

• Az optikus kiveszi a lencsét.
• ahz OP-ti-koosh KEE-ve-see ah LEN-chayt

A few useful pronunciation notes:

• Stress is normally on the first syllable of each word.
• s in Hungarian sounds like English sh.
• sz sounds like English s.
• cs sounds like English ch.
• e is usually like e in bed.
• é is a longer sound, roughly like ay in say, but cleaner and tenser.

So:

• optikus → the final -kus is actually -koosh
• kiveszi → the sz is a plain s sound
• lencsét → cs gives the ch sound