La bestkuracisto kontrolis la hundidon.

La is the Esperanto definite article, equivalent to English the.

So La bestkuracisto means the veterinarian / the vet, not just a veterinarian.

A few useful points:

• la does not change for gender, number, or case
• it is always just la
• Esperanto has no indefinite article, so bestkuracisto by itself could mean a veterinarian or just veterinarian depending on context

Bestkuracisto is a compound word:

• besto = animal
• kuraci = to treat medically
• -ist- = a person professionally associated with something
• -o = noun ending

So:

• besto + kurac + ist + o
• literally: animal-treatment professional
• natural English meaning: veterinarian / vet

Esperanto very commonly builds words this way, and compounds are usually written as one word.

The ending -is marks the past tense.

So:

• kontroli = to check / to examine
• kontrolis = checked / examined

Esperanto verb endings are very regular:

• -as = present
• -is = past
• -os = future
• -us = conditional
• -u = command / volitive
• -i = infinitive

So kontrolis tells you immediately that the action happened in the past.

The final -n marks the direct object.

In this sentence, the veterinarian is doing the action of checking, and the puppy is what gets checked. That makes la hundidon the direct object.

Compare:

• La bestkuracisto kontrolis la hundidon. = The veterinarian checked the puppy.
• La hundido kontrolis la bestkuraciston. = The puppy checked the veterinarian.

That -n is very important because it helps show who is doing the action and who is receiving it.

Not exactly. Hundido means puppy, and it is built from:

• hundo = dog
• -id- = offspring, young one, descendant

So hundido is specifically a young dog.

This is different from hundeto:

• hundido = puppy, young dog
• hundeto = little dog, small dog, dear little dog

That difference is useful:

• -id- = young one / offspring
• -et- = smallness or affection

Because la hundidon means the puppy, referring to a specific puppy.

In Esperanto, the definite article can appear before both subject and object, just as in English:

• La bestkuracisto = the veterinarian
• la hundidon = the puppy

If you removed it, hundidon would mean a puppy or just puppy depending on context.

Yes, Esperanto word order is fairly flexible because the -n ending helps show the object.

So these can mean the same thing:

• La bestkuracisto kontrolis la hundidon.
• La hundidon kontrolis la bestkuracisto.

Both mean The veterinarian checked the puppy, because hundidon has -n, so it is still the object.

That said, the first version is the most neutral and natural for beginners:

• subject + verb + object

In this sentence, bestkuracisto is the subject because it does not have the accusative -n, while hundidon does.

So:

• La bestkuracisto = the one doing the action
• kontrolis = performed the action
• la hundidon = received the action

Esperanto often relies more on endings than on word order to show this.

Yes. Kontroli often means to check, inspect, or examine.

In a veterinary context, kontrolis la hundidon is perfectly natural for checked/examined the puppy.

Depending on context, Esperanto could also use more specific verbs, but kontroli is a common, clear choice.

A simple pronunciation guide is:

La best-kura-CIS-to kon-TRO-lis la hun-DI-don

A few details:

• c in Esperanto sounds like ts
• stress is always on the second-to-last syllable
• every written vowel is pronounced clearly

So:

• bestkuracisto → bes-tku-ra-CIS-to
• kontrolis → kon-TRO-lis
• hundidon → hun-DI-don

Yes. Literally, bestkuracisto is very close to animal doctor, but the natural English translation is veterinarian or vet.

So these are all good ways to understand it:

• The veterinarian checked the puppy.
• The vet checked the puppy.
• more literally: The animal doctor checked the puppy.

The literal meaning can help you remember the word, even if the normal translation is veterinarian.