Pisanje u bilježnicu mi pomaže da bolje pamtim nove riječi.

Here, pisanje is a noun, not a finite verb. It is a verbal noun formed from pisati (to write), and it means writing.

In this sentence, Pisanje u bilježnicu is the subject: Writing in/into a notebook helps me...

This type of noun is very common in Croatian:

• čitati → čitanje = reading
• učiti → učenje = learning
• pisati → pisanje = writing

This is a very common question. With pisati, Croatian often uses u + accusative when you mean write something into a notebook/book/diary, as if the writing is being put into that space.

So:

• pisati u bilježnicu = to write in/into a notebook

By contrast, u bilježnici is the locative, which usually emphasizes location:

• To piše u bilježnici. = That is written in the notebook.
• Imam to u bilježnici. = I have that in the notebook.

So in your sentence, u bilježnicu is the normal choice for the action of writing things down in a notebook.

Bilježnicu is accusative singular.

The dictionary form is bilježnica = notebook.

The change is:

• bilježnica → nominative singular
• bilježnicu → accusative singular

Because u here is used with motion/result-of-placement, it takes the accusative.

Mi means to me or simply me.

It is the dative singular clitic of ja (I).

In Croatian, pomagati / pomoći usually takes a person in the dative:

• To mi pomaže. = That helps me.
• On joj pomaže. = He helps her.
• Možeš li nam pomoći? = Can you help us?

So: Pisanje u bilježnicu mi pomaže... = Writing in a notebook helps me...

Because mi is a clitic, and Croatian clitics usually go in the second position of the sentence or clause.

Here the first unit is: Pisanje u bilježnicu

Then the clitic comes: mi

Then the verb: pomaže

So: Pisanje u bilježnicu mi pomaže...

This word order is very natural. Croatian clitic placement does not always match English word order.

Croatian very often uses da + present tense where English might use an infinitive.

So:

• pomaže mi da bolje pamtim literally: helps me that I remember better but naturally: helps me remember better

This da-clause is extremely common and natural in Croatian.

You may also sometimes see infinitive-like solutions in related structures, but da + present is one of the most important patterns to get used to.

Because Croatian usually omits subject pronouns when the verb ending already shows who the subject is.

Pamtim ends in -m, which tells you it means I remember.

So Croatian normally says:

• pamtim = I remember
• pišem = I write
• učim = I learn / study

You would add ja only for emphasis, contrast, or clarity:

• Ja pamtim, a on zaboravlja. = I remember, but he forgets.

Bolje means better, and here it is an adverb.

It modifies the verb pamtim:

• better remember

Compare:

• dobro = well
• bolje = better

This is different from the adjective:

• dobar = good
• bolji = better

So here it is not describing a noun; it is describing how you remember.

They are in the accusative plural, because they are the direct object of pamtim (I remember).

Base form:

• nova riječ = a new word

Plural:

• nove riječi = new words

In this sentence:

• pamtim nove riječi = I remember new words

A detail that can confuse learners: riječi has the same form in both nominative plural and accusative plural, so you identify the case from its role in the sentence.

Because pamtiti and zapamtiti are related but not identical.

• pamtiti = to remember, to retain, to keep in memory; often ongoing or habitual
• zapamtiti = to memorize, to manage to remember, to commit to memory; more completed/result-focused

In this sentence, the idea is general and repeated: Writing in a notebook helps me remember new words better.

That makes pamtim a good choice.

If you said zapamtim, the nuance would shift more toward: helps me memorize / learn new words successfully

Yes, Croatian word order is fairly flexible, but the emphasis changes and clitic rules still matter.

For example:

• Pisanje u bilježnicu mi pomaže da bolje pamtim nove riječi.
• Pisanje u bilježnicu pomaže mi da bolje pamtim nove riječi.

The first version is more natural for many speakers.

You could also restructure the sentence entirely:

• Nove riječi bolje pamtim kad ih pišem u bilježnicu. = I remember new words better when I write them in a notebook.

So the exact order can vary, but not completely freely.

Because Croatian has no articles like English a/an/the.

So:

• bilježnica can mean a notebook or the notebook
• riječi can mean words or, depending on context, the words

The listener understands from context what is meant.

That is why Croatian learners of English often struggle with articles, and English speakers learning Croatian often look for them even though they are not there.

In natural English, you would usually say writing in a notebook.

But grammatically, Croatian u bilježnicu reflects the idea of writing something into that notebook. So the Croatian structure may feel a little more directional than the usual English translation.

That is why a very literal translation can sound slightly odd in English, even though the Croatian is perfectly natural.