בלי רשות אי אפשר להיכנס לחדר הזה.

בלי means without.

In this sentence, בלי רשות means without permission.

A very common pattern in Hebrew is:

• בלי + noun
• without + noun

Examples:

• בלי כסף — without money
• בלי מים — without water
• בלי רשות — without permission

So the sentence begins by setting a condition: without permission...

Because the sentence means without permission in a general sense, not without the permission of some specific, already-known permission.

So:

• בלי רשות = without permission
• בלי הרשות = without the permission

In English, we also usually say without permission, not without the permission, unless we mean a very specific permission already mentioned.

אי אפשר is a very common Hebrew expression meaning:

• it is impossible
• one cannot
• it can't be done

In everyday English, it is often best translated simply as you can't.

So here:

• אי אפשר להיכנס = it is impossible to enter / you can't enter

This is an impersonal expression. It does not literally say I can't or you can't with a subject pronoun. Hebrew often uses this kind of structure.

Modern Hebrew does not usually use a direct equivalent of English can in the same way English does.

Instead, Hebrew often uses:

• אפשר — it is possible / you may / can
• אי אפשר — it is impossible / cannot

So rather than saying something like you cannot enter, Hebrew naturally says something closer to it is not possible to enter.

This is one of the most important patterns for English speakers to get used to.

Because after אפשר and אי אפשר, Hebrew normally uses an infinitive.

So the structure is:

• אפשר + infinitive
• אי אפשר + infinitive

Examples:

• אפשר לבוא — it is possible to come / you can come
• אי אפשר לצאת — it is impossible to leave / you can't leave
• אי אפשר להיכנס — it is impossible to enter / you can't enter

So להיכנס is not tied to a subject like I enter or he enters. It is just the basic to enter form.

להיכנס literally means to enter / to go in.

It comes from the root כ-נ-ס, which is related to entering. In this form, it is a very common everyday verb for going into a place.

So:

• להיכנס לחדר = to enter the room / to go into the room

For learners, it is best to understand להיכנס as the normal spoken Hebrew way to say to enter or to go in.

Because the verb להיכנס commonly takes the preposition ל־ (to / into) in modern Hebrew.

So:

• להיכנס לחדר = to enter the room

This is very natural Hebrew.

Also, לחדר is made of:

• ל־ = to / into
• החדר = the room

These combine into לחדר in normal spelling.

So לחדר הזה literally works like into this room.

Because when certain prepositions attach to a noun with ה־ (the), the spelling changes.

Here:

• ל + החדר becomes לחדר

This is a normal Hebrew contraction.

The same happens with other prepositions too:

• ב + הבית → בבית — in the house
• כ + הילד → כילד — as the child / like the child
• ל + החדר → לחדר — to the room

So even though you do not see a separate ה, the noun is still definite: the room.

הזה means this.

In Hebrew, demonstratives like this usually come after the noun, not before it as in English.

So:

• החדר הזה = this room
• literally: the room this

This is normal Hebrew word order.

Also, הזה agrees with the noun:

• חדר is masculine singular
• so the sentence uses הזה, the masculine singular form of this

For comparison:

• הספר הזה — this book
• הדלת הזאת — this door

Because in Hebrew, when you say this/that + noun, the noun itself is usually also definite.

So Hebrew says:

• החדר הזה — this room
• הספר הזה — this book
• הילדה הזאת — this girl

This is different from English, where this room does not use the.

In Hebrew, this double definiteness is normal:

• החדר = the room
• הזה = this
• together: החדר הזה = this room

Because Hebrew allows some flexibility in word order, and starting with בלי רשות emphasizes the condition first:

• בלי רשות אי אפשר להיכנס לחדר הזה
  = Without permission, you can't enter this room.

You could also say:

• אי אפשר להיכנס לחדר הזה בלי רשות

This means essentially the same thing.

The version with בלי רשות first sounds a little more like:

• Without permission — no entry
• it highlights the rule immediately

So this is a style and emphasis choice, not a change in basic meaning.

In practice, it is mainly about permission.

Literally, אי אפשר means it is impossible, but in many real-life contexts it is used where English would simply say:

• you can't
• you're not allowed to

So this sentence is understood as:

• You can't enter this room without permission
• You are not allowed to enter this room without permission

If you wanted a more directly prohibition-based wording, Hebrew could also say:

• אסור להיכנס לחדר הזה בלי רשות — It is forbidden to enter this room without permission.

That version sounds more explicitly like a rule.

It is completely natural and standard Hebrew.

It can fit:

• signs
• rules
• school or workplace instructions
• everyday speech

A sign on a door might say exactly this, or something very close to it.

For a more official or strict tone, you might also see:

• אין להיכנס לחדר הזה בלי רשות
• אסור להיכנס לחדר הזה בלי רשות

But the sentence you have is very normal and easy to understand.

A simple pronunciation guide is:

Bli reshút אי efshár lehikanés lachéder hazé.

A few stress points:

• בלי — stress on the second syllable: bli
• רשות — stress at the end: reshút
• אפשר — stress at the end: efshár
• להיכנס — stress at the end: lehikanés
• הזה — stress at the end: hazé

If you want a smoother whole-sentence rhythm:

Bli reshút, אי efshár lehikanés lachéder hazé.

Yes.

If you say just:

• בלי רשות אי אפשר להיכנס

it means:

• Without permission, you can't enter
• or entry without permission is not possible

Adding לחדר הזה makes it specific:

• into this room

So the full sentence is simply more precise about where entry is forbidden or not allowed.