Felfedezzük a csapóajtót.

It has several pieces:

• fel- = a verbal prefix
• fedez = the verb stem
• -z- = part of the stem here
• -zük / -jük = the ending for we with a definite object

So felfedezzük means we discover it / we discover the ... depending on context.

In dictionary form, the verb is felfedez = to discover.

Because Hungarian uses two kinds of verb conjugation:

• indefinite conjugation: when there is no definite direct object
• definite conjugation: when the direct object is definite

Here the object is a csapóajtót = the trapdoor, which is definite, so the verb must also be in the definite conjugation.

That is why you get:

• felfedezünk = we discover / we are discovering (something, not definite)
• felfedezzük a csapóajtót = we discover the trapdoor

Because csapóajtó is the basic dictionary form, but here it is the direct object of the verb, so it takes the accusative ending -t:

• csapóajtó = trapdoor
• csapóajtót = trapdoor + accusative, so the trapdoor as the thing being discovered

The article a means the.

So:

• a csapóajtó = the trapdoor (subject/basic form)
• a csapóajtót = the trapdoor (object form)

Hungarian has two forms of the:

• a before consonant sounds
• az before vowel sounds

Since csapóajtó begins with cs, which is a consonant sound, the correct form is a:

• a csapóajtó
• but az ajtó

It is built into the verb.

In Hungarian, subject pronouns are often omitted because the verb ending already shows the subject. In felfedezzük, the ending tells you the subject is we.

So Hungarian usually says:

• Felfedezzük a csapóajtót.

rather than

• Mi felfedezzük a csapóajtót.

The pronoun mi = we can be added for emphasis, but it is not necessary.

Yes, it is a compound noun.

• ajtó = door
• csapó- relates to something that flips, swings, or drops shut

So csapóajtó literally suggests something like a flap door or drop door, which is why it means trapdoor.

Hungarian forms many words this way by combining smaller parts.

A rough English-friendly guide is:

fel-feh-DEZZ-zewk aw CHAW-poe-eye-TOHT

A few important sound notes:

• e is usually like the e in bed
• é is longer, like ay in say
• a in Hungarian is more like o in British hot
• á is a longer, broader a
• cs sounds like ch
• sz sounds like s
• zs sounds like the s in measure
• gy (not in this sentence, but common) is a soft sound somewhat like dy

Also, Hungarian stress normally falls on the first syllable of each word:

• FELfedezzük
• A
• CSApóajtót

In felfedez, the prefix fel- is part of the verb as it is normally used.

Many Hungarian verbs have prefixes that modify the meaning. Sometimes the prefix has a clear spatial sense, but in many verbs it becomes part of the established meaning of the whole verb.

Here:

• fedez by itself is not what learners usually use for discover
• felfedez is the normal verb meaning discover

A useful extra point: Hungarian verbal prefixes can move away from the verb in some sentence types.

For example:

• Felfedezzük a csapóajtót. = neutral statement
• Nem fedezzük fel a csapóajtót. = We do not discover the trapdoor.

So the prefix is important both for meaning and sentence structure.

Yes, in the right context, Hungarian present tense can sometimes refer to the future.

So Felfedezzük a csapóajtót most naturally means:

• We discover the trapdoor
• or We are discovering the trapdoor

But depending on context, it could also mean:

• We will discover the trapdoor

Hungarian often relies on context or time expressions rather than a separate future form.

No, Hungarian word order is flexible, but changing it often changes the emphasis.

The sentence

• Felfedezzük a csapóajtót.

is a neutral way to say it.

If you move things around, you may create special emphasis or contrast. For example:

• A csapóajtót fedezzük fel. = It is the trapdoor that we discover.
• Mi fedezzük fel a csapóajtót. = We are the ones who discover the trapdoor.

So the original order is normal and neutral, not the only possible order.

Because some Hungarian nouns can take the accusative -t directly, while others need a linking vowel.

Here the noun ends in a long vowel:

• csapóajtó → csapóajtót

No extra vowel is needed.

Compare this with nouns that do need one:

• könyv → könyvet
• asztal → asztalt

This is something you get used to over time by seeing patterns.

Yes. That would mean We discover a trapdoor.

There are two changes:

• egy csapóajtót = a trapdoor / one trapdoor instead of the trapdoor
• felfedezünk instead of felfedezzük, because the object is no longer definite

So:

• Felfedezzük a csapóajtót. = We discover the trapdoor.
• Felfedezünk egy csapóajtót. = We discover a trapdoor.

This is a very important Hungarian pattern.