חומר האריזה שומר על תכולה שבירה.

חומר האריזה is a construct phrase (called סמיכות in Hebrew), meaning the material of the packaging or more naturally the packaging material.

In this structure:

• חומר = material
• האריזה = the packaging

When two nouns are linked this way, the first noun usually does not take ה־ directly. The definiteness is determined by the second noun:

• חומר אריזה = packaging material / a packaging material
• חומר האריזה = the packaging material

So חומר האריזה is the normal compact Hebrew way to say it.

The verb שומר comes from לשמור, which often means to keep, to guard, or to protect.

With the preposition על, it commonly means:

• to protect
• to watch over
• to safeguard

So in this sentence, שומר על is best understood as protects or keeps safe.

Examples:

• הוא שומר על הילד = He watches over / protects the child.
• הקופסה שומרת על המוצר = The box protects the product.

Because לשמור על is a very common Hebrew combination meaning to protect / take care of / watch over something.

Compare:

• לשמור = to keep / to guard
• לשמור על משהו = to protect / guard / preserve something

So שומר על תכולה שבירה literally has the sense of protects fragile contents.

This is just the normal pattern of the verb in this meaning, so learners usually need to memorize לשמור על as a unit.

תכולה means contents or content, especially the contents of a box, package, container, etc.

In Hebrew, תכולה is a singular feminine noun, even though in English contents is usually plural.

So Hebrew says something more like:

• fragile content/contents

and the verb/adjective agreement follows the Hebrew noun, not the English translation.

That is why the adjective is also singular feminine:

• תכולה שבירה

Because it agrees with תכולה, which is a feminine singular noun.

Agreement in Hebrew usually works like this:

• masculine singular: adjective in masculine singular form
• feminine singular: adjective in feminine singular form
• masculine plural: adjective in masculine plural form
• feminine plural: adjective in feminine plural form

So:

• תכולה = feminine singular
• therefore שבירה = feminine singular

If the noun were masculine singular, you would expect שביר instead.

Here it means fragile or breakable, not already broken.

The adjective שביר / שבירה usually describes something that can easily break.

So:

• מוצר שביר = a fragile product
• תכולה שבירה = fragile contents

If you wanted to say something is already broken, Hebrew would normally use a different form, such as שבור / שבורה.

In the sentence as written, תכולה שבירה is indefinite:

• תכולה שבירה = fragile contents
• התכולה השבירה = the fragile contents

Hebrew often leaves a noun indefinite when speaking in a general sense. Here the idea is that the packaging material protects fragile contents, not necessarily some already identified specific contents.

Also notice that in Hebrew, if the noun is definite, the adjective must also be definite:

• תכולה שבירה = fragile contents
• התכולה השבירה = the fragile contents

The sentence follows a very normal Hebrew order:

• חומר האריזה = subject
• שומר על = verb phrase
• תכולה שבירה = object/complement

So literally:

• Packaging material protects fragile contents

Also note that adjectives usually come after the noun in Hebrew:

• תכולה שבירה = fragile contents
• not the reverse

And the construct phrase חומר האריזה stays together as one unit.

A common pronunciation would be:

chómer ha-arizá shomér al tkhulá shvirá

A more detailed breakdown:

• חומר = CHO-mer
• האריזה = ha-a-ri-ZA
• שומר = sho-MER
• על = al
• תכולה = tkhu-LA
• שבירה = shvi-RA

Approximate stress:

• חֹמֶר הָאֲרִיזָה שׁוֹמֵר עַל תְּכוּלָה שְׁבִירָה

The main stress is usually on the last syllable in האריזה, תכולה, and שבירה.

It can mean several related things, depending on context:

• material / substance
• matter
• stuff
• sometimes even study material

In חומר האריזה, it clearly means material, as in the substance used for packaging.

Other examples:

• חומר כימי = a chemical substance
• חומר לימוד = study material
• חומר גלם = raw material

So context tells you which English translation fits best.

Yes. That is a very natural English rendering.

Because שומר על can mean:

• protects
• safeguards
• keeps safe

So possible translations include:

• The packaging material protects fragile contents.
• The packaging material keeps fragile contents safe.
• The packing material safeguards fragile contents.

All of these match the Hebrew well.

You would normally say:

חומר האריזה שומר על התכולה השבירה.

Notice the definiteness on both the noun and the adjective:

• התכולה = the contents
• השבירה = fragile

In Hebrew, definite nouns take definite adjectives too, so you need both ה־ prefixes there.

It is understandable and grammatical, but on actual packaging Hebrew often uses shorter label-style wording, such as:

• תכולה שבירה = Fragile contents
• שביר = Fragile
• יש להיזהר = Handle with care / Caution
• נא לטפל בעדינות = Please handle gently

So the sentence is good Hebrew, but it sounds a bit more like explanatory or descriptive language than a typical printed warning label.