Medicus iecur curat.

Medicus is the subject, and iecur is the direct object.

Why?

• Medicus is in the nominative singular, the case typically used for the subject.
• Iecur is in the accusative singular, the case typically used for the direct object.
• The verb curat is singular, so it matches medicus: the doctor treats.

So the basic structure is:

• medicus = subject
• iecur = object
• curat = verb

Because in Latin, not every accusative singular ends in -m.

English-speaking learners often first see examples like:

• puellam
• servum
• dominum

so it is easy to think direct objects always have -m. But that is only true for certain declensions and noun types.

Iecur is a neuter noun, and neuter nouns have an important rule:

• nominative = accusative

So the form iecur can be both nominative and accusative singular. In this sentence, it is accusative because it is the thing being treated.

Iecur is a third-declension neuter noun, and it is somewhat irregular.

A dictionary may list it as:

• iecur, iecoris n.

The important thing for this sentence is simply:

• it is neuter
• its nominative singular and accusative singular are both iecur

So even though it may look unusual, the form in the sentence is correct.

Curat is:

• third person singular
• present tense
• active voice
• indicative mood

It comes from the verb curare, meaning things like:

• to care for
• to attend to
• to treat

So curat means he/she/it treats or cares for.

In this sentence, since the subject is medicus, the natural meaning is the doctor treats.

Latin does not have articles like English the and a/an.

So medicus can mean:

• a doctor
• the doctor

and iecur can mean:

• a liver
• the liver

Which one sounds best depends on context. Latin leaves that for the reader or listener to infer.

Word order in Latin is more flexible than in English because the word endings show each word’s job.

So all of these could express roughly the same basic idea:

• Medicus iecur curat
• Iecur medicus curat
• Curat medicus iecur

However, the word order can change the emphasis.

In a simple sentence like this, putting the verb last, as in Medicus iecur curat, is very natural Latin style.

Yes. Curare has a range of meanings, including:

• to care for
• to look after
• to take care of
• to treat medically

So the exact English translation depends on context.

Because the subject is medicus and the object is iecur, a medical sense such as treats is especially natural here.

Medicus is a second-declension masculine noun in the nominative singular.

The ending -us is very common for that kind of noun. So here medicus is the dictionary form and also the subject form.

A learner might notice that many male professions or male persons in Latin have this pattern, for example:

• servus
• amicus
• dominus
• medicus

But the important point is not just the ending itself; it is the whole form in the sentence. Here medicus is nominative singular, so it works as the subject.

As written, medicus is grammatically masculine.

If you wanted to specify a female doctor, you would normally use medica.

So:

• medicus = male doctor, or sometimes a grammatically masculine form
• medica = female doctor

In this sentence, the form shown is masculine.

Because the verb ending already tells you the person and number.

Curat by itself already means:

• he treats
• she treats
• it treats

Latin often leaves subject pronouns out unless they are needed for emphasis or clarity.

So in this sentence, there is no need for a separate pronoun like he. The noun medicus already tells you who is doing the action, and curat confirms that the subject is third person singular.