Etiam puer taciturnus bonus esse potest, si officiosus est et alios non offendit.

Here etiam means even.

So Etiam puer taciturnus bonus esse potest means Even a quiet boy can be good.

In other contexts, etiam can also mean also, but in this sentence even is the most natural sense.

Because taciturnus and bonus both describe puer.

• puer = boy
• taciturnus = quiet / reserved / taciturn
• bonus = good

Since puer is:

• masculine
• singular
• nominative

the adjectives agreeing with it must also be:

• masculine
• singular
• nominative

This is basic adjective agreement in Latin.

Because potest means is able or can, and in Latin it is often followed by an infinitive.

• potest = can
• esse = to be

So:

• bonus esse potest = he can be good

Latin uses the infinitive esse where English uses be after can.

Because potest needs a verb to complete the idea.

In English, we say:

• He can be good

In Latin, that must be:

• bonus esse potest

Without esse, bonus potest would be incomplete or unnatural, because potest is not just linking bonus directly to the subject; it is expressing the ability to be something.

It is predicative.

That means bonus is not simply part of the noun phrase good boy. Instead, it is part of the statement about the boy:

• puer bonus can mean a good boy if used attributively
• but in puer ... bonus esse potest, bonus means the boy can be good

So here bonus is tied to esse and describes what the boy can be.

Si means if and introduces a condition.

So the second part of the sentence:

• si officiosus est et alios non offendit

means:

• if he is dutiful/helpful and does not offend others

This explains the condition under which the first statement is true.

Because officiosus is an adjective, and Latin usually needs a form of esse to say someone is something.

• officiosus = dutiful / obliging / helpful
• officiosus est = he is dutiful

So just as English says he is helpful, Latin says officiosus est.

Officiosus is a little broader than any single English word.

Depending on context, it can mean:

• dutiful
• obliging
• helpful
• considerate
• attentive to what is right or expected

In this sentence, it suggests that the quiet boy is good if he behaves in a responsible and considerate way.

Because alios is the direct object of offendit.

• alii = others as a subject
• alios = others as an object

Here the meaning is he does not offend others, so others receives the action of the verb. That makes it accusative.

Also, alios is masculine plural, often used in a mixed or general sense for other people.

Here offendit means offends, annoys, or gives offense to.

So:

• alios non offendit = he does not offend others

Latin offendere can have a range of meanings in different contexts, including more literal ones like strike against or encounter, but here the social sense offend is the right one.

Because non normally negates the word or phrase that follows, and very often it comes right before the verb.

So:

• non offendit = does not offend

That is a very standard and natural placement in Latin.

They are both present tense.

• est = is
• offendit = offends / does offend

The sentence gives a general truth or general condition:

• Even a quiet boy can be good, if he is dutiful and does not offend others.

Latin often uses the present tense this way, just as English does.

Because Latin often leaves the subject unstated when it is clear from the verb ending or context.

• est already means he/she/it is
• offendit already means he/she/it offends

Here the context makes it clear that the implied subject is the puer from the first part of the sentence.

So Latin does not need to repeat a separate word for he.

It may feel unusual to an English speaker, but it is normal for Latin.

Latin word order is more flexible because endings show grammatical relationships. The sentence is arranged in a natural and stylistic Latin way:

• Etiam is placed first for emphasis: even
• puer taciturnus gives the subject
• bonus esse potest completes the main idea
• si ... adds the condition afterward

A more English-like order would not be necessary in Latin, because the endings already show what goes with what.

Not necessarily.

Taciturnus usually means:

• quiet
• reserved
• not talkative
• taciturn

It does not have to mean that the boy never speaks. The idea is more about personality than total silence.

So the sentence is saying that being quiet or reserved does not prevent someone from being good.