Die onderdelelys is in die monteerstel.

Die is the Afrikaans definite article, equivalent to English the.

So in Die onderdelelys, it means the parts list.

A useful thing for English speakers: Afrikaans uses die for:

• singular nouns: die boek = the book
• plural nouns: die boeke = the books

It does not change for gender, and it does not have different forms like the / the / the depending on case. That makes it simpler than in many other languages.

Because there are two separate definite nouns:

• die onderdelelys = the parts list
• die monteerstel = the assembly kit

So the structure is:

Die onderdelelys | is | in die monteerstel
subject | verb | prepositional phrase

Just like in English, if both nouns are definite, each one normally needs its own the.

Onderdelelys is a compound noun, which is very common in Afrikaans.

It can be broken down as:

• onderdele = parts
• lys = list

Together:

• onderdelelys = parts list

Afrikaans often joins nouns together into one word where English may use two words. This is something English speakers need to get used to.

Other examples of this pattern:

• woordeboek = dictionary literally word-book
• huisdeur = front door / house door

Because in Afrikaans compounds, the first part can be plural in form even though the whole compound is a single noun.

So:

• onderdele = parts
• onderdelelys = parts list (one list, about parts)

The whole noun is singular here because the sentence says Die onderdelelys is ... meaning one specific list.

This is similar to English expressions like sports car or arms dealer, where the first element may look plural or category-like, but the whole expression is still one noun.

Yes, in this sentence is is the verb to be, just like English is.

A very helpful feature of Afrikaans is that this form does not change the way English does:

• Ek is = I am
• Jy is = you are
• Hy is = he is
• Ons is = we are
• Hulle is = they are

So unlike English am / is / are, Afrikaans simply uses is for all persons in the present tense.

Yes. In usually means in or inside.

So:

• in die monteerstel = in the assembly kit

This works very much like English. It introduces a prepositional phrase that tells you where something is.

Examples:

• Die boek is in die sak. = The book is in the bag.
• Die sleutel is in die laai. = The key is in the drawer.

It is another compound noun:

• monteer = assemble / mount
• stel = set / kit

So monteerstel means something like:

• assembly kit
• assembly set

Again, Afrikaans often writes this as one word, whereas English may prefer two words.

Because this is a straightforward main clause, and Afrikaans word order here is quite close to English:

Die onderdelelys | is | in die monteerstel
subject | verb | location

So the sentence structure is:

• subject first
• verb second
• place phrase after the verb

That is completely normal in Afrikaans.

One thing to remember, though: Afrikaans word order changes more noticeably in some other sentence types, especially subordinate clauses. But in a simple sentence like this, it looks comfortably familiar to an English speaker.

Usually in is the natural choice here.

Binne can mean inside, but it is not always interchangeable with in. In everyday neutral statements of location, in is the most normal preposition.

So:

• Die onderdelelys is in die monteerstel. = natural and standard

If you used binne, it might sound more emphatic or less neutral depending on context.

For a learner, the safest choice in this kind of sentence is in.

You would usually replace the first die with ’n if you mean a or an:

• ’n Onderdelelys is in die monteerstel.

That means:

• A parts list is in the assembly kit.

A few important notes:

• ’n is the Afrikaans indefinite article
• it is written with a lowercase n, even at the beginning of a sentence in normal spelling conventions if the article itself is first; the following word is capitalized when needed in running text conventions, for example ’n Onderdelelys...
• in pronunciation, ’n is usually a weak unstressed sound, like a schwa

If you wanted to make onderdelelys plural, it would usually become onderdelelyste:

• Die onderdelelyste is in die monteerstel.

That means:

• The parts lists are in the assembly kit.

Notice two useful Afrikaans points here:

1. Die still stays die
2. is still stays is

So Afrikaans is simpler than English in that the article and the verb do not change the way English the / the and is / are do.

A rough English-friendly guide:

• onderdelelys ≈ ON-der-day-luh-lace
• monteerstel ≈ mon-TEER-stel

A few pronunciation tips:

• ee in monteer is a long vowel, roughly like eer in steer, though not exactly the same as English
• y in lys sounds like the vowel in Dutch huis or something between English ay and eye, depending on accent and how accurately you want to imitate Afrikaans
• stress in compounds often falls strongly on the first main element, though natural speech can vary

If you are learning, it is more important at first to recognize these as compound words than to pronounce them perfectly.