Maafkan saya, kunci pendua hilang.

The ending -kan turns maaf into a verb-like form meaning forgive.

So:

• maaf = sorry / apology
• maafkan saya = forgive me

Literally, maafkan saya means forgive me, but in real use it often functions like I’m sorry or please excuse me.

Both are possible, but maaf is much more common in everyday speech.

• Maaf = simple, natural, everyday sorry
• Maafkan saya = more explicit, more formal, or more emotionally apologetic

So the sentence is understandable, but many speakers would more naturally say:

• Maaf, kunci pendua saya hilang.

Malay often does not use a separate word for is/am/are in sentences like this.

So:

• kunci pendua hilang literally looks like duplicate key lost
• but it naturally means the duplicate key is lost or the duplicate key is missing

This is very normal in Malay. English needs is, but Malay often does not.

Hilang can behave like a stative verb or adjective-like predicate, depending on how you analyze it.

In practical learner terms, it means things like:

• lost
• missing
• gone
• disappeared

In kunci pendua hilang, it describes the state of the key: it is missing/lost.

You can think of it as similar to how Malay often uses one word where English might use either an adjective or a verb phrase.

Because Malay usually puts the main noun first and the describing word after it.

So:

• kunci = key
• pendua = duplicate / copy

Therefore:

• kunci pendua = duplicate key

This noun + modifier order is very common in Malay:

• rumah besar = big house
• kereta merah = red car
• kunci pendua = duplicate key

Pendua means duplicate, copy, or duplicate version.

So kunci pendua is a key that has been copied from another key.

Depending on context, English might translate it as:

• duplicate key
• spare key
• copy of the key

But there can be a small nuance:

• kunci pendua focuses on it being a copied key
• kunci ganti can sound more like a replacement or spare key

Often, yes. If you specifically mean my duplicate key, then:

• kunci pendua saya hilang

is clearer.

Without saya, kunci pendua hilang can still work if the ownership is already obvious from context, but it sounds a little less specific.

So compare:

• Kunci pendua hilang. = The duplicate key is lost / A duplicate key is lost.
• Kunci pendua saya hilang. = My duplicate key is lost.

Malay generally does not use articles like English a/an/the.

So kunci pendua can mean:

• a duplicate key
• the duplicate key

The exact meaning depends on context.

This is very normal in Malay, and learners have to get used to reading definiteness from the situation rather than from an article.

As written, kunci pendua hilang mainly states the result or situation: the duplicate key is missing/lost.

It does not strongly focus on who lost it.

If you want to focus more on the speaker’s action or responsibility, Malay could also use forms like:

• Saya kehilangan kunci pendua. = I lost the duplicate key.
• Saya menghilangkan kunci pendua. = I lost/misplaced the duplicate key.

Very roughly:

• hilang = be lost / be missing
• kehilangan = lose / suffer the loss of
• menghilangkan = cause to be lost, misplace

The comma helps separate the apology from the explanation.

So it works like:

• Maafkan saya = apology
• kunci pendua hilang = explanation

It is similar to English punctuation in a sentence like I’m sorry, the duplicate key is missing.

In speech, of course, you just pause slightly. In writing, the comma makes the structure clearer.

The sentence is understandable, but many speakers would probably say one of these more natural versions:

• Maaf, kunci pendua saya hilang.
• Maaf, saya kehilangan kunci pendua.
• Maaf, kunci pendua itu hilang. if a specific duplicate key has already been mentioned

Why these may sound more natural:

• Maaf is more common than maafkan saya in casual speech
• adding saya after kunci pendua makes the ownership clear
• alternative verb choices can make the meaning more specific

So the original sentence is fine for learning, but in real conversation speakers often make it a little more explicit.