המגן ממש חזק.

ה־ is the Hebrew definite article, equivalent to the in English.

So:

• מגן = a shield / shield
• המגן = the shield

In pronunciation, the ה־ is attached directly to the word: ha-magen.

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

So instead of saying:

• the strong shield

Hebrew normally uses the order:

• the shield strong

That is why חזק comes after המגן.

This is a very common Hebrew pattern:

• ילד טוב = a good boy
• הילד טוב = the boy is good / in some contexts the good boy, depending on structure and context

In your sentence, חזק is functioning as the predicate adjective: the shield is strong.

Hebrew often leaves out the verb to be in the present tense.

So:

• המגן ממש חזק literally looks like
• the shield really strong

but it means

• the shield is really strong

This omission is completely normal in modern Hebrew.

Compare:

• הוא עייף = he is tired
• הספר מעניין = the book is interesting

But in past or future tense, Hebrew does use forms of to be:

• הוא היה עייף = he was tired
• הוא יהיה עייף = he will be tired

ממש is a very common intensifier in Hebrew. Here it means something like:

• really
• very
• truly

So ממש חזק means really strong.

In everyday speech, ממש is extremely common and natural.

It can also be used more broadly in conversation, for example:

• זה ממש טוב = that’s really good
• אני ממש עייף = I’m really tired

Because מגן is a masculine singular noun, the adjective must match it in gender and number.

So:

• masculine singular: חזק
• feminine singular: חזקה
• masculine plural: חזקים
• feminine plural: חזקות

Since מגן is masculine singular, חזק is the correct form.

If the noun were feminine, you would use חזקה instead.

A simple pronunciation guide is:

ha-ma-GEN ma-MASH kha-ZAK

More specifically:

• המגן = ha-ma-GEN
• ממש = ma-MASH
• חזק = kha-ZAK

A few notes:

• ג in מגן sounds like g in go
• ח in חזק is the throaty Hebrew sound, like ch in German Bach or Scottish loch
• Stress is usually on the last syllable here: magen, mamash, chazak

Not always. מגן can mean:

• shield
• protector
• defender

In many contexts, it refers to an actual shield, but in other contexts it can be metaphorical or part of a title or expression.

So the exact meaning depends on context. In a simple sentence like this, learners will often first understand it as the shield.

In this sentence, it can feel like either one in English.

• really strong
• very strong

Both capture the basic meaning well.

That said, ממש often feels especially close to really in casual spoken Hebrew. It is a common conversational intensifier.

So if you are trying to get the tone, really strong is often a good match.

Yes. A sentence like המגן ממש חזק usually describes a quality or characteristic of the shield.

It sounds like:

• the shield is strong
• the shield is sturdy
• the shield has great strength

Hebrew present-tense adjective sentences like this often describe a current state or a general property, and context tells you which is intended. In many cases, both readings are possible unless the larger context makes one clearer.