Licet vox Marci parva sit, magistra eum clare respondere audit.

That is a very common question, because licet often does mean it is permitted.

But in this sentence, licet is being used in a different way: as a conjunction meaning although, even though, or granted that.

So here:

• Licet vox Marci parva sit = Although Marcus's voice is quiet/small

A useful rule of thumb:

• licet + dative + infinitive = it is permitted
• licet + subjunctive clause = although / even though

In this sentence, it is followed by vox Marci parva sit, and that tells you it is the concessive licet meaning although.

Because after concessive licet meaning although, Latin normally uses the subjunctive.

So:

• sit = present subjunctive of esse
• not est, which would be indicative

The clause:

• Licet vox Marci parva sit

literally has the pattern:

• Although Marcus's voice may be small

In smoother English, we usually just say:

• Although Marcus's voice is small/quiet

So sit is there because the grammar after this kind of licet requires the subjunctive, not because the meaning is especially doubtful.

Marci is genitive singular, meaning of Marcus.

So:

• vox = voice
• Marci = of Marcus

Together:

• vox Marci = Marcus's voice or the voice of Marcus

This is a basic use of the genitive of possession.

Because parva agrees with vox.

• vox is a feminine noun
• it is singular
• it is nominative here

So the adjective describing it must also be:

• feminine
• singular
• nominative

That gives:

• vox parva = a small voice

If the noun were masculine, you might expect parvus, but vox is feminine, so parva is correct.

Vox is nominative singular.

It is the subject of the clause introduced by licet:

• vox Marci parva sit

So inside that clause:

• vox = subject
• parva = predicate adjective describing vox
• sit = verb

In other words:

• Marcus's voice is quiet/small

Eum is accusative because it is the person whom the teacher hears.

• magistra = the teacher
• audit = hears
• eum = him

So in the main clause:

• magistra eum audit = the teacher hears him

But there is one more important point: eum is not only the object of audit. It is also the understood subject of respondere.

So Latin is really saying:

• the teacher hears him replying

This is a standard Latin construction with verbs of perception like audio, video, and sentio.

Because after verbs of perception like audit, Latin often uses an infinitive to show what someone is heard doing.

So:

• magistra eum respondere audit

means:

• the teacher hears him reply
• or the teacher hears him replying

This is different from using a finite verb like respondet.

If you said something with respondet, you would need a different structure. But Latin often prefers:

• audio aliquem facere = I hear someone do/doing something

Here:

• eum = the person being heard
• respondere = what he is heard doing

It is very similar to one, and many learners notice that right away.

Strictly speaking, this is best understood as the accusative + infinitive construction after a verb of perception:

• magistra eum respondere audit

That means:

• the teacher hears him replying

This is closely related to indirect statement in form, because it also uses:

• an accusative subject (eum)
• an infinitive (respondere)

But the sense is slightly different. With verbs of saying, thinking, knowing, etc., this is clearly indirect statement:

• dicit eum respondere = she says that he is replying

With audit, it often means direct perception:

• audit eum respondere = she hears him replying

So the form is the same as indirect statement, but the function here is specifically with a verb of hearing.

Eum is the one doing the replying.

That is one reason the accusative is important. In this construction, the accusative noun or pronoun is the subject of the infinitive.

So:

• magistra = the one who hears
• eum = the one who replies
• respondere = to reply / replying

So the sentence does not mean that the teacher hears and then replies clearly. It means she hears him replying clearly.

Clare is an adverb, and it modifies respondere.

So:

• clare respondere = to reply clearly

It does not describe how the teacher hears. It describes how he replies.

That is an important distinction:

• magistra eum clare respondere audit = the teacher hears him reply clearly
• not the teacher clearly hears him reply in the sense of without difficulty

Latin word order can sometimes make this less obvious at first, but grammatically clare goes with respondere.

Not necessarily. Latin often uses parvus with things like vox to mean small, slight, or more naturally in English, quiet or soft.

So the idea is something like:

• Although Marcus's voice is quiet, the teacher hears him reply clearly.

That is not really contradictory. A voice can be soft, but the words can still be distinct and understandable.

So in context, parva is probably better understood as:

• quiet
• soft
• faint

rather than literally tiny.

Because Latin word order is much more flexible than English word order.

The sentence begins with the concessive clause:

• Licet vox Marci parva sit = Although Marcus's voice is quiet

Then it moves to the main clause:

• magistra eum clare respondere audit = the teacher hears him reply clearly

Latin often places a subordinate clause first for emphasis or for logical flow. In English we can do the same:

• Although Marcus's voice is quiet, the teacher hears him reply clearly.

So the position of magistra is perfectly normal. Its form, not just its position, tells you its role:

• magistra = nominative singular, so it is the subject of audit

Usually although or even though is the best choice here.

Concessive licet can sometimes shade toward granted that or even if, depending on context, but in this sentence the most natural sense is:

• Although Marcus's voice is quiet, the teacher hears him reply clearly.

So for a learner, although is the safest understanding here.

A helpful way is to divide it into two parts:

1. Subordinate concessive clause

   • Licet vox Marci parva sit
   • Although Marcus's voice is quiet

2. Main clause

   • magistra eum clare respondere audit
   • the teacher hears him reply clearly

Inside the main clause, there is also the infinitive construction:

• eum respondere = him replying

So the full structure is:

• Although
  • subjunctive clause
• then a main clause with audio + accusative + infinitive

That makes this sentence a nice example of two very common Latin patterns used together.