Magistra discipulos exercet.

Because magistra is in the nominative singular form, which is the form Latin normally uses for the subject.

• magistra = the female teacher / teacher as subject
• discipulos = a different case, so it is not the subject
• exercet = she trains/exercises

So the grammar tells you that magistra is the one doing the action.

Because discipulos is in the accusative plural, the case used for a direct object.

Here the students are receiving the action of the verb, so Latin uses the object form:

• discipuli = students as a subject
• discipulos = students as a direct object

So in this sentence, magistra discipulos exercet, the teacher is acting on the students, which is why discipulos appears in the accusative plural.

Exercet is:

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

It comes from the verb exerceo, exercere, meaning to train, to exercise, or to keep busy depending on context.

So exercet means she trains/exercises or the teacher trains/exercises.

Classical Latin usually does not have words that directly equal English the or a/an.

So:

• magistra can mean teacher, a teacher, or the teacher
• discipulos can mean students, the students, or sometimes some students

The exact English wording depends on context. English needs an article; Latin usually does not.

Yes. Magistra is the feminine form.

• magister = male teacher/master
• magistra = female teacher/mistress/teacher

So this sentence specifically refers to a female teacher.

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

For example, these would still mean roughly the same thing:

• Magistra discipulos exercet
• Discipulos magistra exercet
• Exercet magistra discipulos

The endings still show:

• magistra = subject
• discipulos = object

That said, different word orders can slightly change emphasis.

They belong to different declensions:

• magistra is first declension
• discipulos comes from discipulus, which is second declension

More specifically:

• magistra = nominative singular of magistra, magistrae
• discipulos = accusative plural of discipulus, discipuli

So this sentence gives you a good example of how Latin uses noun endings from different declensions to mark grammatical function.

Because the verb ending already tells you the subject is third person singular: exercet = he/she/it exercises.

Since the noun magistra is present, Latin does not need to add a separate pronoun. In fact, Latin often leaves pronouns out unless they are needed for emphasis or contrast.

So instead of saying something like she the teacher trains the students, Latin simply says:

• Magistra discipulos exercet

It can mean several related things, depending on context:

• trains
• drills
• exercises
• keeps busy in practice

In a school-style sentence like this, trains or drills is often the most natural sense. If the context were physical activity, exercises could also fit.

So the verb has a broader meaning than just modern English exercise in the fitness sense.

A simple classroom pronunciation would be roughly:

mah-GIS-trah dee-skee-POO-lohs ek-SER-ket

A few notes:

• g in magistra is always a hard g
• c in discipulos and exercet is always a hard k sound
• vowel sounds are usually pure, not diphthongized as often happens in English

If you are using restored classical pronunciation, c is always k, which is especially important for beginners.