Grammar Rule in 30 Seconds
The ke-an construction turns adjectives or verbs into abstract nouns, like adding '-ness' or '-ity' in English.
- Add 'ke-' prefix and '-an' suffix to a root word: 'baik' (good) becomes 'kebaikan' (goodness).
- Use it to describe a state or condition: 'keadaan' (the state/situation) from 'ada' (to exist).
- It can also denote a place or location: 'kedutaan' (embassy) from 'duta' (envoy).
Ke-an Noun Formation
| Root Word | Category | Ke-an Form | Meaning |
|---|---|---|---|
|
baik
|
adjective
|
kebaikan
|
goodness
|
|
indah
|
adjective
|
keindahan
|
beauty
|
|
datang
|
verb
|
kedatangan
|
arrival
|
|
duta
|
noun
|
kedutaan
|
embassy
|
|
raja
|
noun
|
kerajaan
|
kingdom
|
|
sakit
|
adjective
|
kesakitan
|
pain/suffering
|
|
tahu
|
verb
|
ketahuan
|
being found out
|
|
aman
|
adjective
|
keamanan
|
security
|
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
ke- + root + -an
|
Kebaikan itu nyata.
|
|
Negative
|
bukan + ke- + root + -an
|
Bukan kebaikan yang dia cari.
|
|
Question
|
apakah + ke- + root + -an
|
Apakah keindahan itu abadi?
|
|
Subjective
|
ke- + root + -an + adalah
|
Kesehatan adalah harta.
|
|
Possessive
|
ke- + root + -an + ku/mu/nya
|
Kebutuhanku banyak.
|
|
Adjectival
|
ke- + root + -an + yang + adj
|
Keadaan yang sulit.
|
Meanings
The ke-an circumfix is used to derive abstract nouns from adjectives, verbs, or other nouns to express qualities, states, or locations.
Abstract Quality
Expressing a quality or characteristic (like -ness).
“Kebaikan itu perlu.”
“Kecantikan dia alami.”
State or Condition
Describing a state of being or a situation.
“Keadaan ekonomi membaik.”
“Kematian itu menyedihkan.”
Location or Institution
Denoting a place associated with the root word.
“Kedutaan besar tutup.”
“Kecamatan itu ramai.”
フォーマル度スペクトル
Keadaan ini sangat buruk. (Describing a situation)
Keadaannya buruk. (Describing a situation)
Keadaannya jelek. (Describing a situation)
Kondisinya parah banget. (Describing a situation)
Ke-an Noun Categories
Quality
- kebaikan goodness
State
- keadaan situation
Location
- kedutaan embassy
Ke-an vs. Other Nouns
レベル別の例文
Kebaikan dia besar.
Her kindness is great.
Kesehatan itu penting.
Health is important.
Keadaan baik.
The situation is good.
Kecantikan itu alami.
That beauty is natural.
Kedutaan ada di Jakarta.
The embassy is in Jakarta.
Kebutuhan saya banyak.
My needs are many.
Keberhasilan ini milik kita.
This success belongs to us.
Kematian itu menyedihkan.
That death is sad.
Kesejahteraan rakyat adalah prioritas.
The welfare of the people is a priority.
Kediaman itu sangat mewah.
That residence is very luxurious.
Kejujuran adalah kebijakan terbaik.
Honesty is the best policy.
Kecepatan internet sangat lambat.
The internet speed is very slow.
Keamanan data harus ditingkatkan.
Data security must be improved.
Kecurigaan polisi terbukti benar.
The police's suspicion proved correct.
Keistimewaan ini hanya untuk tamu.
This privilege is only for guests.
Ketidakpastian ekonomi mengkhawatirkan.
Economic uncertainty is worrying.
Keberlangsungan proyek ini terancam.
The sustainability of this project is threatened.
Keterlibatan mereka sangat krusial.
Their involvement is very crucial.
Ketersediaan barang sangat terbatas.
The availability of goods is very limited.
Ketidakhadiran dia tidak dijelaskan.
His absence was not explained.
Keagungan arsitektur ini tak terbantahkan.
The grandeur of this architecture is undeniable.
Keterasingan sosial adalah isu nyata.
Social alienation is a real issue.
Ketergantungan pada teknologi meningkat.
Dependence on technology is increasing.
Keteguhan hati adalah kunci sukses.
Steadfastness of heart is the key to success.
間違えやすい
Both are nominalizers, but ke-an is for states/qualities, pe-an is for processes.
Some ke-an words look like passive verbs.
Using ke-an when the base word is already a noun.
よくある間違い
ke-baik-an
kebaikan
kegila
kegilaan
ke-makan-an
makanan
ke-indah
keindahan
ke-datang
kedatangan
ke-sakit
kesakitan
ke-raja
kerajaan
ke-berhasil
keberhasilan
ke-butuh
kebutuhan
ke-aman
keamanan
ke-tahu-an
ketahuan
ke-hadir-an
kehadiran
ke-tergantung-an
ketergantungan
ke-asing-an
keterasingan
文型パターン
___ adalah kunci sukses.
Saya menyukai ___ dia.
___ ekonomi saat ini sangat sulit.
___ data menjadi prioritas utama.
Real World Usage
Kebaikan hatinya viral.
Keberhasilan saya adalah...
Di mana kedutaan?
Keadaan ekonomi membaik.
Ketersediaan stok terbatas.
Keadaannya gimana?
Start Small
Don't Over-apply
Context is Key
Formal Tone
Smart Tips
Use ke-an to turn an adjective into a noun.
Use 'keadaan' to sound professional.
Use ke-an for administrative places.
Use ke-an to nominalize verbs.
発音
Stress
Stress usually falls on the penultimate syllable of the root word.
Statement
Kebaikan itu nyata. ↘
Falling intonation for declarative sentences.
暗記しよう
記憶術
Ke-an is the 'Key' to turning words into nouns.
視覚的連想
Imagine a box. You put a word inside, and the 'ke-' lid and '-an' bottom seal it shut, turning the word into a solid noun block.
Rhyme
Add ke at the start, add an at the end, a brand new noun you now can send.
Story
Budi wanted to describe his 'good' friend. He took the word 'baik', put a 'ke' hat on it, and 'an' shoes on it. Now, his friend's 'kebaikan' (goodness) was a noun he could talk about all day.
Word Web
チャレンジ
Write 5 sentences today using a different ke-an noun in each one.
文化メモ
Ke-an nouns are heavily used in official documents and government terminology to sound professional and precise.
Younger generations often use ke-an nouns to emphasize qualities, sometimes ironically.
Using abstract ke-an nouns is a sign of a well-educated speaker.
The circumfix ke-an is derived from Proto-Austronesian roots.
会話のきっかけ
Apa kebaikan terbesar temanmu?
Bagaimana keadaan ekonomi sekarang?
Apa keistimewaan kota ini?
Bagaimana keterlibatanmu dalam proyek ini?
日記のテーマ
よくある間違い
Test Yourself
___ (baik) itu penting.
Which is a valid ke-an noun?
Find and fix the mistake:
Ke-datang-an dia terlambat.
Arrange the words in the correct order:
All words placed
Click words above to build the sentence
The embassy is closed.
Answer starts with: Ked...
Match each item on the left with its pair on the right:
Build a sentence.
Which word describes a state?
Score: /8
練習問題
8 exercises___ (baik) itu penting.
Which is a valid ke-an noun?
Find and fix the mistake:
Ke-datang-an dia terlambat.
adalah / Kebaikan / kunci / sukses.
The embassy is closed.
Match: indah -> ?
Build a sentence.
Which word describes a state?
Score: /8
よくある質問 (8)
No, only for words that logically form abstract nouns.
Yes, it nominalizes the root.
Indonesian has many prefixes; ke-an is just one for nominalization.
It is neutral and used in all registers.
It often changes the meaning to a place or state related to that noun.
Context is the only way to tell.
Yes, it turns verbs into abstract nouns.
Some words have irregular noun forms, but ke-an is very consistent.
Scaffolded Practice
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Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
-dad / -idad
Indonesian uses a circumfix (prefix + suffix) while Spanish uses only a suffix.
-té / -tion
Indonesian's ke-an covers states, qualities, and locations.
-heit / -keit
German is a suffix-only language; Indonesian uses a circumfix.
-sa / -mi
Japanese suffixes are attached to the stem; Indonesian uses a circumfix.
ta- / -iyya
Arabic is non-concatenative; Indonesian is concatenative.
de / xing
Chinese does not use affixation for nominalization.
