Frater autem frigidarium timet, quia aqua in piscina ibi frigidissima est.

In Latin, autem is a postpositive word, which means it very often comes second in its clause, even though in English we might translate it as however, but, or on the other hand and place it later.

So:

Frater autem frigidarium timet
literally has autem near the beginning because that is the normal Latin placement.

This is very common with words like autem, enim, and igitur.

Latin does not have definite or indefinite articles like English the, a, or an.

So:

• frater can mean brother, a brother, or the brother
• frigidarium can mean a cold room or the cold room

You figure out which one is meant from the context.

Frater is nominative singular, which is the case typically used for the subject of the sentence.

The verb timet means fears or is afraid of, and the person doing that action is frater.

So:

• frater = the subject, brother
• timet = fears

Together: the brother fears...

Frigidarium is the direct object of timet, so it is in the accusative singular.

The tricky part is that frigidarium is a neuter noun. In many neuter nouns of the second declension, the nominative singular and accusative singular have the same form.

So for frigidarium:

• nominative singular: frigidarium
• accusative singular: frigidarium

Even though the form looks unchanged, its job in the sentence tells you it is the object here.

In Latin, the verb ending often tells you the subject.

Timet is:

• third person singular
• present tense
• from timeo, timere = to fear

So timet means:

• he fears
• she fears
• it fears

Because the subject is frater, we understand it as he fears.

Latin often leaves out subject pronouns like he, she, and they unless they are needed for emphasis.

Quia means because and introduces a clause giving the reason.

So:

quia aqua in piscina ibi frigidissima est
= because the water in the pool there is very cold / coldest

It explains why the brother fears the cold room.

With in, Latin uses different cases depending on the meaning:

• in + ablative = in/on a place, showing location
• in + accusative = into/onto a place, showing motion toward

Here, in piscina means in the pool, so it describes where the water is. That requires the ablative.

So:

• in piscina = in the pool
• in piscinam would mean into the pool

Ibi means there. It adds an extra sense of place or emphasis.

So in piscina ibi is something like:

• in the pool there
• there in the pool

Latin sometimes uses both a prepositional phrase and an adverb of place together more freely than English does. It may sound slightly repetitive in English, but it is normal enough in Latin.

Frigidissima is an adjective agreeing with aqua.

Since aqua is:

• feminine
• singular
• nominative

the adjective describing it must match:

• frigidissima = feminine singular nominative

So:

• aqua ... frigidissima est = the water is very cold or literally the water is coldest

If it described a neuter noun like frigidarium, then you would expect a neuter form such as frigidissimum.

Grammatically, frigidissima is the superlative form of frigidus, so its basic form means coldest.

However, in many contexts Latin superlatives can be translated more naturally as very cold, especially when no explicit comparison is being made.

So here, depending on the teaching context, it may be understood as:

• coldest
• very cold
• extremely cold

All of these reflect the idea of a high degree of coldness.

Latin word order is much more flexible than English word order because the endings show grammatical relationships.

Putting est at the end is very normal in Latin, especially in simple descriptive clauses.

So:

aqua in piscina ibi frigidissima est

can be rearranged in English as:

• the water there in the pool is very cold

Latin often saves the verb for the end, but it does not have to.

Yes, often it could.

Because Latin uses cases and verb endings, the core meaning is not as dependent on word order as English is. For example, many rearrangements would still express the same basic idea.

But word order can affect emphasis. In this sentence:

• Frater comes first, so the brother is the starting point
• autem comes second, as usual
• frigidissima is placed close to est, giving a neat descriptive ending

So the current word order is natural and stylistically sensible, even though Latin allows flexibility.