Numeral ke- attaches to a cardinal expression to create an ordinal or a collective form: dua → kedua, tiga → ketiga, seratus → keseratus. The resulting word can order one member—peserta ketiga “the third participant”—or package a complete set—ketiga peserta “all three participants.”
This bound prefix is spelled differently from directional ke, which remains a separate preposition in ke rumah “to the house” and ke dua kota “to two cities.” This page focuses on formation and spelling; the ke- meaning page maps its readings, while the ke- usage page handles syntax and register. In analysis, write ke- + dua; in an actual word, write kedua.
The canonical template
The productive numeral template is straightforward:
ke- + cardinal numeral → ordinal/collective numeral
| Analysis | Actual word | Ordinal noun phrase | Collective noun phrase |
|---|---|---|---|
| ke- + dua | kedua | peserta kedua | kedua peserta |
| ke- + tiga | ketiga | bab ketiga | ketiga bab |
| ke- + seratus | keseratus | pelanggan keseratus | keseratus pelanggan |
Peserta kedua belum masuk ke ruang wawancara.
The second participant has not entered the interview room yet.
Kedua peserta sudah menyerahkan kartu identitas.
Both participants have submitted their identity cards.
Bab ketiga membahas perubahan bunyi.
The third chapter discusses sound change.
Ketiga bab itu harus dibaca sebelum ujian.
All three chapters must be read before the exam.
Word order selects the interpretation: after the noun, the derived numeral orders a member; before the noun, it normally totals over the known set.
The required segmentation table
Numeral ke- has no productive consonant-changing allomorphy in these forms. The prefix remains ke-, and the full cardinal base remains visible. The last two rows are additional natural formations.
| Cardinal base | Analysis | Surface result | What is preserved |
|---|---|---|---|
| dua | ke- + dua | kedua | the complete base dua |
| tiga | ke- + tiga | ketiga | the complete base tiga |
| seratus | ke- + seratus | keseratus | the complex base seratus |
| empat | ke- + empat | keempat | both adjacent written e vowels |
| sepuluh | ke- + sepuluh | kesepuluh | the complex base sepuluh |
Tim kami finis di urutan keempat.
Our team finished in fourth place.
Keempat ban harus diperiksa sebelum perjalanan jauh.
All four tires must be checked before a long trip.
Pertemuan kesepuluh akan diadakan secara daring.
The tenth meeting will be held online.
Kesepuluh peserta lolos ke tahap berikutnya.
All ten participants advanced to the next stage.
Unlike meN- and peN-, numeral ke- does not delete initial p, t, s, or k. It also has no root-consonant deletion to reverse. This is an important negative rule: preserve the base exactly rather than importing nasal-substitution habits from another prefix.
Vowel contact remains visible in spelling
Before a vowel-initial numeral, attachment creates adjacent written vowels. Standard spelling preserves them: keempat and keenam, not kempat or kenam. Speech may smooth the boundary, but ordinary orthography does not remove the root vowel.
Anak keempat mereka lahir pada bulan Mei.
Their fourth child was born in May.
Saya baru memahami bagian itu setelah membaca untuk keenam kalinya.
I only understood that section after reading it for the sixth time.
Keenam pintu darurat harus tetap terbuka selama pemeriksaan.
All six emergency exits must remain open during the inspection.
There is no accent mark distinguishing the two e vowels. Indonesian standard spelling relies on the written sequence and the reader's knowledge of the morpheme boundary.
Complex numeral bases
Ke- attaches to the first written word of a spelled-out complex ordinal: kedua puluh “twentieth,” ketiga puluh satu “thirty-first,” keseratus “hundredth,” and keseribu “thousandth.” The remaining parts preserve the cardinal expression.
Kantor itu merayakan ulang tahun kedua puluh.
That office celebrates its twentieth anniversary.
Ia menjadi pelari ketiga puluh satu yang mencapai garis finis.
She became the thirty-first runner to reach the finish line.
Pembeli keseratus menerima hadiah kecil dari toko.
The hundredth customer received a small gift from the shop.
Keseratus kursi di aula sudah terisi.
All one hundred seats in the hall are occupied.
The bracketing of keseratus is [ke-[seratus]]: numeral ke- has scope over the already complex cardinal seratus. Do not reanalyze it as kese- + ratus merely from its visible letters.
Digits require a boundary hyphen
When an ordinal is written with Arabic digits, the boundary is marked by a hyphen: ke-2, ke-10, ke-100. This is a graphic exception motivated by the transition from letters to digits; it does not make hyphenated ke-dua acceptable.
Rapat ke-2 dijadwalkan pada hari Kamis.
The second meeting is scheduled for Thursday.
Ia menempati peringkat ke-10 dalam lomba itu.
She placed tenth in that competition.
Pelanggan ke-100 menerima voucher belanja.
The hundredth customer received a shopping voucher.
In polished prose, spelled-out kedua and numeric ke-2 are both possible depending on editorial style. Forms such as ke2 and ke 2 are nonstandard.
First: pertama and restricted kesatu
The ordinary word for “first” is lexical pertama, not a form mechanically built by adding ke- to a nonexistent everyday cardinal tama. Kesatu does exist, especially in labels, ranked categories, legal enumeration, or explicit contrast with kedua, but pertama is the normal general ordinal.
Ini pertama kalinya saya berbicara di depan umum.
This is my first time speaking in public.
Bab pertama menjelaskan tujuan penelitian.
The first chapter explains the research objective. (academic)
Pihak kesatu wajib menyerahkan dokumen kepada pihak kedua.
The first party must submit the documents to the second party. (legal)
The legal example shows why kesatu should not be called universally wrong. Its use is lexically and stylistically narrower than pertama.
Bound ke- versus free ke
Directional ke introduces a destination and takes a space. Attached ke- builds a numeral word. Compare three sequences:
Kami pergi ke dua kota dalam satu hari.
We went to two cities in one day.
Kami pergi ke kota kedua setelah makan siang.
We went to the second city after lunch.
Kedua kota itu memiliki jaringan trem.
Both cities have tram networks.
In ke dua kota, dua kota is the entire destination noun phrase; free ke means “to.” In kota kedua, attached kedua orders the city. In kedua kota, it groups both cities.
Setelah rapat, dia kembali ke lantai ketiga.
After the meeting, she returned to the third floor.
This sentence contains both forms: free ke marks the destination, while attached ketiga orders the floor.
Root-category restrictions and lexical look-alikes
Productive ordinal/collective ke- selects cardinal numeral expressions, not arbitrary nouns or adjectives. Words such as ketua, kekasih, kehendak, and keluar begin with ke but are not newly generated ordinals.
Ketua panitia membuka rapat tepat pukul sembilan.
The committee chair opened the meeting at exactly nine.
Dia keluar sebentar untuk menjawab panggilan telepon.
She stepped outside briefly to answer a phone call.
Compare solid lexical keluar “go out” with directional ke luar gedung “to the outside of the building.” A visible letter sequence does not prove the presence of productive numeral ke-.
Dia berjalan ke luar gedung untuk mencari udara segar.
She walked outside the building to get some fresh air.
Dictionary lookup and base recovery
For transparent numerals, recover the cardinal by removing attached ke-: ketiga → tiga, keempat → empat, keseratus → seratus. Dictionaries may list the derived numeral and its senses while cross-referencing or grouping it with the cardinal family. Search the whole surface form when word order or a frozen reading is unclear.
Do not strip ke from every word. The base of ketua is not productive tua in the ordinal schema, and keluar must be checked as a whole lexical verb. Morphological recovery requires a live relationship in both form and meaning.
Common Mistakes
1. Separating an ordinal prefix
❌ Ini perjalanan bisnis saya yang ke dua.
Incorrect ordinal spelling—the lowercase numeral base attaches to ke-.
✅ Ini perjalanan bisnis saya yang kedua.
This is my second business trip.
2. Joining a destination preposition
❌ Kami pergi kedua kota dalam satu hari.
Incorrect for ‘to two cities’—directional ke is separate from the noun phrase dua kota.
✅ Saat liburan, kami pergi ke dua kota dalam satu hari.
During the vacation, we went to two cities in one day.
3. Deleting a vowel at the prefix boundary
❌ Dia mendapat kursi kempat dari depan.
Incorrect—the e of ke- and the e of empat are both preserved in spelling.
✅ Dia mendapat kursi keempat dari depan.
She got the fourth seat from the front.
4. Separating ke- from a complex cardinal base
❌ Pembeli ke seratus menerima hadiah.
Incorrect—spelled-out keseratus is one derived word.
✅ Pembeli keseratus menerima hadiah.
The hundredth customer received a gift.
5. Omitting the hyphen before digits
❌ Pertemuan ke10 akan berlangsung bulan depan.
Incorrect graphic boundary—the ordinal prefix requires a hyphen before digits.
✅ Pertemuan ke-10 akan berlangsung bulan depan.
The tenth meeting will take place next month.
Key Takeaways
- Attach numeral ke- to spelled-out cardinal bases: kedua, ketiga, keempat, keseratus.
- The productive numeral prefix is invariant and deletes no root consonant; preserve even adjacent vowels in keempat and keenam.
- After a noun, the form is ordinal; before a noun, it commonly groups the complete set.
- Write numeric ordinals with a hyphen: ke-2, ke-10.
- Keep directional ke separate: ke rumah, ke dua kota, ke lantai ketiga.
Now practice Indonesian
Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.
Start learning Indonesian →Related Topics
- Writing di and ke: Prefix or PrepositionA1 — Choose solid or separate spelling for di and ke by identifying whether each form is an affix or a preposition.
- ke: Direction and DestinationA1 — Use free ke for movement toward destinations and endpoints, contrasting it with static di and attached ordinal or derivational ke-.
- Ordinals with ke- and pertamaA2 — Form first through tenth, place ordinals after nouns, distinguish buku ketiga from ketiga buku, and write word and digit ordinals correctly.
- Writing Numbers, Money, Dates, and UnitsA2 — Use Indonesian digits, number words, separators, rupiah notation, dates, percentages, and measurement units.
- ke-: Meanings and Derivational NetworkC1 — Understand how numeral ke- orders one member or gathers a complete definite set while free ke marks direction toward a destination.
- ke-: Valency, Lexicalization, and RegisterC1 — Place ke- numerals accurately in noun phrases and clauses, choose cardinal, ber-, digit, or lexical alternatives, and recognize frozen ke-initial words.