An Indonesian k at the beginning or in the middle of a word is usually a familiar velar stop [k], made with the back of the tongue against the soft palate. At the end of a syllable or word, however, the same written consonant can be released [k], left unreleased [k̚], or realized as a glottal stop [ʔ]. The glottal realization is widespread and entirely ordinary; it is not separately written.
This page gives a practical Standard Indonesian listening and speaking system. Exact regional distributions belong on the regional overview, while the general relationship between letters and sounds belongs on the alphabet page.
Stable k at the beginning of a syllable
In kaki “foot; leg,” both instances of k begin a syllable: /ka.ki/. Close the airflow with the back of the tongue and release directly into the vowel. Indonesian /k/ is typically unaspirated or only lightly aspirated, so it does not need the strong puff of air often heard in English key.
Kaki saya masih sakit setelah berjalan jauh kemarin.
My feet still hurt after walking a long way yesterday.
Taruh sepatunya di dekat kaki meja.
Put the shoes near the table leg.
The ordinary meaning of kaki comes from context, not a pronunciation difference: it can refer to a human or animal foot/leg and to the supporting leg of an object. In both cases, its k sounds begin syllables.
Three possible endings for written k
At the end of a word, speakers manage the closure in several ways:
| Realization | What the articulators do | Where learners may hear it |
|---|---|---|
| [k] | back-of-tongue closure followed by an audible release | careful emphasis; some regional accents |
| [k̚] | back-of-tongue closure with no audible release | neutral/careful speech in many accents |
| [ʔ] | vocal folds close at the glottis instead of a released oral closure | neutral or informal speech in many widespread regional varieties |
The glottal stop [ʔ] is the brief catch in the middle of some pronunciations of English uh-oh. In a common pronunciation of tidak “not,” the final part may sound [tidaʔ]. That [ʔ] is the pronunciation of the word's final k in that accent and context. The consonant has not disappeared from the lexical form.
Saya tidak bisa datang malam ini.
I can't come tonight.
Makanannya enak, tetapi saya tidak terlalu lapar.
The food is delicious, but I'm not very hungry.
Why [ʔ] is not “dropping the k”
A glottal stop is a real consonantal closure. It is made lower in the vocal tract than [k], but it still closes the syllable. Compare kota “city” with kotak “box.” In an accent with glottal final k, the contrast can be approximately [kota] versus [kotaʔ]. The second word does not simply become identical to the first.
Kantor posnya ada di tengah kota, di sebelah toko berbentuk kotak.
The post office is in the city center, beside the box-shaped shop.
Kotaknya kecil, tetapi semua kabel muat di dalamnya.
The box is small, but all the cables fit inside it.
Final place also distinguishes words. Baik “good; all right” ends in k, while bait “stanza” ends in t. The stops may both be unreleased in careful speech, but they involve different closures; in a glottalizing accent, baik may end [ʔ] while bait retains an alveolar [t̚].
Baik, saya akan mengirim berkasnya sore ini.
All right, I'll send the file this afternoon.
The word's spelling and its relationships remain stable across pronunciations. This is why learners must hear final [ʔ] as one possible realization of k, not as arbitrary deletion.
The same ending across common words
The pattern recurs in family terms and everyday grammar words. Bapak “father; Mr.; sir” and kakak “older sibling” may end in [k̚] or [ʔ], depending on the speaker. In kakak, the first k starts the second syllable and therefore remains an oral [k], while only the last k has the final variants: approximately /ka.kak/, [ka.kak̚], or [ka.kaʔ].
Bapak sudah makan atau mau saya buatkan nasi goreng?
Have you eaten, Dad, or would you like me to make fried rice?
Kakak saya bekerja di rumah sakit dekat sini.
My older sibling works at the hospital near here.
As address forms, Bapak/Pak are (formal/polite) in institutional interaction and (neutral/polite) toward an older man; Bapak is also (neutral) for one's father. Kak/Kakak are (neutral/informal polite) kinship and address forms. Those register differences do not determine whether the final k is glottalized; accent and speech style do.
Paired audio and recording practice
Use five short comparison tracks or make two recordings of each row yourself. Version A uses a careful [k̚] closure with no strong puff; version B uses [ʔ] where a final k permits it. The meaning and spelling must remain identical in both versions.
| Prompt | Version A | Version B | Listening goal |
|---|---|---|---|
| kaki | [ka.ki] | [ka.ki] | no final k, so no glottal alternation |
| baik | [ba.ik̚] | [ba.iʔ] | same written k, different final closure |
| tidak | [ti.dak̚] | [ti.daʔ] | hear [ʔ] as the final consonant |
| bapak | [ba.pak̚] | [ba.paʔ] | keep medial p distinct from final k |
| kakak | [ka.kak̚] | [ka.kaʔ] | medial [k] stays oral; final k varies |
Kalau Bapak tidak keberatan, saya duduk di sini.
If you don't mind, sir, I'll sit here.
Baik, Kak, pesanannya saya siapkan sekarang.
All right, I'll prepare your order now.
After recording, check two things. First, Version A should not end with the strong release and aspiration of emphatic English back! Second, Version B must contain a brief closure, not a lengthened vowel followed by nothing. A glottal stop may be subtle, but it is articulatorily present.
Regional and style conditioning
Indonesian is spoken over a vast multilingual area. Some accents glottalize final k very consistently; others favor an oral [k̚] or a more audible [k]. Careful reading may strengthen the oral closure, while rapid informal conversation can favor [ʔ]. These tendencies overlap: glottal [ʔ] is not automatically “slang,” and oral [k] is not automatically “more correct.”
There is no honest one-line rule assigning every region one variant, because speakers shift with audience, first language, and formality. The reliable generalization is positional: the alternation concerns syllable-final k. In kaki, neither k is final; in kakak, only the last one is.
Lexical history and syllable structure matter too. Some established loanwords preserve an oral [k] more strongly, especially when k stands before another consonant; careful fakta, for example, has [k] before [t], not [ʔ]. Treat glottalization as a widespread realization of eligible final k, not as an instruction to replace every coda k mechanically.
Common Mistakes
1. Releasing final k like a strongly aspirated English stop
❌ Kata baik diakhiri dengan letupan k yang sangat kuat.
Incorrect — baik ends with an unnecessarily strong English-style release.
✅ Baik, saya tunggu di depan.
All right, I'll wait out front. Use a light unreleased [k̚] or regional [ʔ].
2. Treating glottal realization as spelling deletion
❌ Saya tida tahu jawabannya.
Incorrect — writing tida imitates a pronunciation by deleting standard final k.
✅ Saya tidak tahu jawabannya.
I don't know the answer.
3. Glottalizing every k, including syllable onsets
❌ Kaki saya diucapkan /ʔa.ʔi/.
Incorrect — both k sounds in kaki begin syllables and remain oral [k].
✅ Kaki saya terkena air panas.
Hot water got on my foot. Pronounce kaki /ka.ki/.
4. Hearing [ʔ] as complete absence of a consonant
❌ Kotak dianggap sama bunyinya dengan kota.
Incorrect — final [ʔ] still closes kotak and distinguishes it from kota.
✅ Kotak itu terlalu besar untuk rak ini.
That box is too big for this shelf.
Key Takeaways
- Initial and intervocalic k are oral [k], as in kaki.
- Final written k may surface as released [k], unreleased [k̚], or glottal [ʔ].
- Glottal [ʔ] is widespread and can be neutral; it is not separately written and does not erase k from the word.
- Practice baik, tidak, bapak, and kakak with both [k̚] and [ʔ], but keep standard spelling unchanged.
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