Ek maak my jas vas, want die wind is koud.

In this sentence, vasmaak is a separable verb in Afrikaans.

• The full verb is vasmaak, meaning to fasten, to tie up, or to do up
• In a main clause, it often splits:
  • Ek maak my jas vas
• In an infinitive or other forms, it stays together:
  • Ek wil my jas vasmaak
  • Om my jas vas te maak

So maak is the verb part, and vas moves to the end of the clause.

Here, vas means something like fast, firmly, or securely.

By itself, vas can mean:

• firm
• tight
• stuck
• secure

In vasmaak, it helps create the meaning fasten / do up / tie securely.

So Ek maak my jas vas is literally something like:

• I make my coat fast

But naturally it means:

• I fasten my coat
• I do up my coat

Yes. In Afrikaans, my can mean both:

• my as a possessive determiner: my jas = my coat
• me as an object pronoun: Hy sien my = He sees me

So the form is the same, but the function is different.

In my jas, it clearly means my, because it comes before a noun.

Compare:

• my jas = my coat
• Hy help my = He helps me

Afrikaans often uses die where English might say the.

So:

• die wind = the wind

This is completely normal. In a sentence like this, you usually need the article.

Compare:

• Die wind is koud = The wind is cold
• Wind is koud would sound unnatural in normal everyday usage

Afrikaans main clauses usually follow the verb-second pattern.

That means the finite verb comes early in the sentence, usually in the second position:

• Ek maak my jas vas

Here:

• Ek = subject
• maak = finite verb
• my jas = object
• vas = separated particle

You do not normally say:

• Ek vasmaak my jas

because vasmaak has to split in a normal main clause.

Because want joins two full clauses:

• Ek maak my jas vas
• die wind is koud

In normal written Afrikaans, a comma is used before want in this kind of sentence.

So:

• Ek maak my jas vas, want die wind is koud.

This is similar to English punctuation with because, although the rules are not always identical in every situation.

Want means because.

But learners often notice that Afrikaans also has omdat, which can also mean because. The big difference is usually word order.

With want, the clause keeps normal main-clause word order:

• Ek maak my jas vas, want die wind is koud.

With omdat, the verb usually goes to the end:

• Ek maak my jas vas, omdat die wind koud is.

So:

• want die wind is koud
• omdat die wind koud is

Both can mean because the wind is cold, but the grammar changes.

Because koud is being used after the verb is, so it is in the predicative position.

In Afrikaans, adjectives often have two forms:

• attributive: before a noun, often with -e
• predicative: after is, usually without -e

Compare:

• die koue wind = the cold wind
• Die wind is koud = The wind is cold

So in your sentence, koud is correct because it comes after is.

Yes. If the adjective comes before the noun, it usually changes form:

• die koue wind = the cold wind

So you could say:

• Ek maak my jas vas, want die koue wind waai hard.

But in your original sentence, the structure is different:

• die wind is koud

There, koud comes after is, so it stays koud, not koue.

Not perfectly. Jas is a general word for an outer garment such as a coat or jacket, depending on context.

So English translations may vary:

• my jas = my coat
• my jas = my jacket

In your sentence, either translation may be possible depending on what kind of clothing is meant.

A rough guide:

• jas sounds like yas
• vas sounds roughly like fuss with a broader a, or a short vahs depending on accent

A few helpful points:

• Afrikaans j is pronounced like English y
• v is often pronounced close to English f
• a is not the same as the English a in day

So:

• jas ≈ yas
• vas ≈ fahs / fuss depending on how roughly you represent it in English spelling

Yes, very often.

Vasmaak is a common everyday verb meaning fasten, tie, secure, or attach.

Examples:

• Maak die deur vas. = Fasten/secure the door.
• Maak jou skoene vas. = Tie your shoes.
• Hy maak die tou vas. = He fastens the rope.

So in your sentence it refers to fastening a coat, but the verb is much broader than that.

You could do that to understand the structure, but it is not natural English.

A literal breakdown is:

• Ek = I
• maak = make
• my jas = my coat
• vas = fast/secure
• want = because
• die wind is koud = the wind is cold

So a literal gloss is:

• I make my coat fast, because the wind is cold

But natural English would be:

• I fasten my coat because the wind is cold
• I do up my coat because the wind is cold

Yes. It sounds natural and everyday.

It uses:

• a very common separable verb: vasmaak
• normal word order
• a very common conjunction: want
• simple, natural vocabulary

So this is a good example of basic conversational Afrikaans.