מזיקים עלולים להיכנס ליחידת אחסון בלי אוורור.

מזיקים is a masculine plural noun here, meaning pests.

Its singular form is מזיק, meaning pest or something harmful.

A few useful points:

• מזיק can come from the root נ־ז־ק, related to damage or harm.
• In some contexts, מזיקים can mean harmful agents more generally, but in a sentence like this it most naturally means pests.

עלולים means something like:

• may
• might
• are liable to
• are likely to

But it often has a slightly negative feeling. It is commonly used when there is a risk of something bad happening.

So:

• מזיקים עלולים להיכנס... = Pests may enter...
• More literally: Pests are liable to enter...

This is different from a more neutral possibility word. For example:

• יכולים = can / are able to
• עשויים = may / might in a more neutral or formal sense
• עלולים = may / might, often with an unwanted result

That makes עלולים a very natural choice here, because pests entering a storage unit is clearly undesirable.

Because מזיקים is plural.

In Hebrew, adjectives and adjective-like words such as עלול must agree with the noun in gender and number.

Here:

• מזיק = singular masculine
• מזיקים = plural masculine

So the matching form is:

• עלול = singular masculine
• עלולים = plural masculine

If the subject were feminine singular, you would use עלולה.
If it were feminine plural, you would use עלולות.

להיכנס is the infinitive form of the verb, meaning to enter.

The ל at the beginning is the normal marker for a Hebrew infinitive, similar to to in English:

• ללכת = to go
• לראות = to see
• להיכנס = to enter

In this sentence, עלולים is followed by an infinitive:

• עלולים להיכנס = may enter / are liable to enter

So the structure is very similar to English:

• may enter
• are likely to enter
• are liable to enter

להיכנס comes from the root כ־נ־ס, which is connected with entering or going in.

The basic past-tense dictionary form is:

• נכנס = entered / went in

The infinitive is:

• להיכנס = to enter / to go in

This verb is in the נפעל pattern, which often gives forms like:

• נכנס
• להיכנס

For a learner, the most useful thing is simply to recognize:

• להיכנס = to enter
• נכנס = entered / enters depending on context

Because the verb להיכנס usually takes the preposition ל־, meaning into / to.

So:

• להיכנס ל... = to enter ...
• literally, to enter into...

That is why you get:

• ליחידת אחסון = into a storage unit

The initial ל is attached directly to the noun, which is very common in Hebrew.

יחידת אחסון means storage unit.

This is a construct phrase in Hebrew, called סמיכות:

• יחידה = unit
• אחסון = storage
• יחידת אחסון = literally unit of storage, meaning storage unit

In Hebrew, the first noun changes form slightly in many construct phrases:

• יחידה becomes יחידת

So this pattern is very common:

• בית ספר = school (literally house of book historically)
• חדר שינה = bedroom (literally room of sleeping)
• יחידת אחסון = storage unit

Because it is the first word in a construct chain.

The standalone form is:

• יחידה

But when it is followed by another noun that defines it, it often changes:

• יחידת אחסון = storage unit

This final ת is a normal construct ending for many feminine nouns ending in ־ה.

Compare:

• מכונה = machine
• מכונת כביסה = washing machine

So:

• standalone: יחידה
• in construct: יחידת

אחסון is a noun. It means storage.

So:

• יחידת אחסון = storage unit
• literally: unit of storage

Related forms:

• לאחסן = to store
• אחסון = storage

This is a very common noun pattern in Hebrew, where a noun expresses the action or concept:

• לשמור = to guard / keep
• שמירה = guarding / protection
• לאחסן = to store
• אחסון = storage

בלי means without.

In this sentence:

• בלי אוורור = without ventilation

It is used directly before a noun or noun phrase:

• בלי מים = without water
• בלי אוכל = without food
• בלי אוורור = without ventilation

It can also be followed by an infinitive in everyday Hebrew:

• בלי לדבר = without speaking

So it is a very useful word to learn.

אוורור means ventilation, airing, or air circulation.

In this sentence:

• בלי אוורור = without ventilation

It is a noun, related to the verb:

• לאוורר = to ventilate / air out

So the connection is:

• לאוורר = to air out
• אוורור = ventilation / airing

Because the sentence is speaking generally, not about specific known pests or a specific known storage unit.

So:

• מזיקים = pests
• יחידת אחסון = a storage unit
• אוורור = ventilation

If the speaker wanted to make things definite, Hebrew could use ה־:

• המזיקים = the pests
• ליחידת האחסון = into the storage unit

But here the sentence sounds general, like a warning or instruction:

• Pests may enter a storage unit without ventilation

That is why the indefinite form is natural.

This is a very normal Hebrew word order:

• subject + modal/adjectival predicate + infinitive

So:

• מזיקים = subject
• עלולים = may be liable / may
• להיכנס = to enter

Hebrew often allows flexibility in word order, but this order is straightforward and natural.

It feels similar to:

• Children may fall
• Pests may enter
• Guests might arrive

So the sentence structure is not unusual; it is just standard Hebrew.

Yes, but the nuance would change slightly.

• עלולים להיכנס = may enter, with a negative or risky implication
• עשויים להיכנס = may enter, more neutral or formal

Because pests entering a storage unit is undesirable, עלולים is the better choice.

So:

• מזיקים עלולים להיכנס... sounds natural and appropriate
• מזיקים עשויים להיכנס... is possible, but less vivid as a warning

A simple pronunciation guide is:

mazikim alulim lehikanes leyekhidat akhsun bli ivrur

A more careful breakdown:

• מזיקים — ma-zi-KIM
• עלולים — a-lu-LIM
• להיכנס — le-hi-ka-NES
• ליחידת — li-ye-khi-DAT
• אחסון — akh-SUN
• בלי — bli
• אוורור — iv-RUR

Notes:

• The כ/ח sounds may be harder for English speakers. They are throatier than English k or h.
• In fast speech, ליחידת may sound very smooth, almost like one flowing word.

You would usually make the second noun definite:

• יחידת אחסון = a storage unit
• יחידת האחסון = the storage unit

In Hebrew construct phrases, definiteness is usually shown on the second noun, but it applies to the whole phrase.

So:

• יחידת האחסון literally looks like unit of the storage, but it means the storage unit

With the preposition:

• ליחידת האחסון = into the storage unit

Not necessarily.

מזיקים can refer to different kinds of pests or harmful creatures, depending on context, for example:

• insects
• rodents
• other unwanted organisms

So it is broader than just bugs.

If the speaker wanted to be very specific, they could choose a narrower word, but מזיקים is a good general word for pests in warnings like this one.