הגלגל הרזרבי באוטו.

Because Hebrew often leaves out is / are in the present tense.

So הגלגל הרזרבי באוטו literally looks like:

• the spare wheel/tire
• in the car

But it means:

• The spare tire is in the car.

This is called a nominal sentence. In present-time statements, Hebrew usually does not use a separate word for is.

Compare:

• הילד בבית = The boy is at home
• המפתח על השולחן = The key is on the table

But in past or future, Hebrew does use a verb:

• הגלגל הרזרבי היה באוטו = The spare tire was in the car
• הגלגל הרזרבי יהיה באוטו = The spare tire will be in the car

ה־ is the Hebrew definite article, meaning the.

So:

• גלגל = wheel
• הגלגל = the wheel

And:

• רזרבי = spare
• הרזרבי = the spare

In Hebrew, when a noun is definite, an adjective describing it usually becomes definite too. So:

• גלגל רזרבי = a spare wheel
• הגלגל הרזרבי = the spare wheel

That is why both words have ה־.

In Hebrew, adjectives usually come after the noun they describe.

So English and Hebrew differ here:

• English: the spare tire
• Hebrew: the tire spare → הגלגל הרזרבי

This is normal Hebrew word order.

More examples:

• בית גדול = a big house
• הבית הגדול = the big house
• ילדה חכמה = a smart girl
• הילדה החכמה = the smart girl

Because adjectives in Hebrew usually agree with the noun in gender and number.

גלגל is a masculine singular noun, so the adjective must also be masculine singular:

• רזרבי = masculine singular
• רזרבית = feminine singular
• רזרביים = masculine plural
• רזרביות = feminine plural

So with גלגל:

• גלגל רזרבי = a spare wheel

If the noun were feminine, the adjective would change:

• מכונית רזרבית would be the matching feminine pattern

באוטו means in the car.

It is made of:

• ב־ = in
• ה־ = the
• אוטו = car

When ב־ and ה־ come together, they combine into בַּ.

So:

• ב + האוטו → באוטו

This is very common in Hebrew:

• בבית = in the house
• בשולחן would not be used because on the table is על השולחן
• בספר = in the book

So באוטו is not just in car; it already includes the: in the car.

There actually is one—it is just merged into the preposition.

As mentioned above:

• ב־ = in
• ה־ = the

Together they become בַּ.

So באוטו already means in the car, not just in a car.

If you wanted in a car, you would usually say:

• באוטו can sometimes be understood generically in context, but formally Hebrew often leaves indefiniteness unmarked
• for a clearly indefinite phrase, context usually does the work

The key point for this sentence is: באוטו is best understood as in the car.

Yes, אוטו is a very common everyday word for car.

It is somewhat more colloquial than some other options, such as:

• מכונית = car
• רכב = vehicle

In everyday speech, אוטו is extremely common and natural.

Also, אוטו is treated as masculine, which affects agreement in other sentences.

Literally, גלגל usually means wheel.

However, in everyday contexts, expressions like גלגל רזרבי are often used the way English speakers say spare tire. Depending on context, it can refer to the spare wheel/tire assembly kept in the car.

So the translation may be given as either:

• the spare wheel
• the spare tire

Both can make sense, depending on context.

It can absolutely be a complete sentence in Hebrew.

Because present-tense is is omitted, הגלגל הרזרבי באוטו works as a full statement:

• The spare tire is in the car.

To an English speaker, it may look like just a noun phrase plus a prepositional phrase, but in Hebrew that is often a normal complete sentence.

That said, without context it could also be read as a phrase in some settings, such as a label or note. But as standard Hebrew, it works perfectly well as a sentence.

A simple pronunciation guide is:

ha-gal-GAL ha-re-zer-VI ba-O-to

A common transliteration is:

ha-galgal ha-rezervi ba'oto

Notes:

• הגלגל = ha-galgal
• הרזרבי = ha-rezervi
• באוטו = ba'oto

The stress is usually near the end in רזרבי and in אוטו.

Yes. Hebrew often allows a few natural alternatives depending on style and vocabulary.

For example:

• הגלגל הרזרבי נמצא באוטו = The spare tire is located in the car
• הגלגל הרזרבי במכונית = The spare tire is in the car using מכונית instead of אוטו

The original sentence is short, natural, and very common in everyday Hebrew. It is especially natural in speech, where Hebrew often prefers concise present-tense sentences without is.