Indonesian adjectives do two central jobs with the same unchanged form. After a noun, besar modifies it: rumah besar “a big house.” After a subject, besar can be the complete predicate: Rumah itu besar “That house is big.” No ordinary equivalent of English is is required.
This flexibility is the core of Indonesian adjective grammar. Adjectives normally follow nouns, accept degree words such as sangat “very,” and do not agree with gender or number. This page maps those patterns while leaving adjective vocabulary and full derivational-affix paradigms to dedicated pages.
One form, two roles
Compare modification and predication:
| Role | Structure | Example | Meaning |
|---|---|---|---|
| modifier | noun + adjective | rumah besar | a big house |
| predicate | subject + adjective | Rumah itu besar. | That house is big. |
Mereka menyewa rumah besar di dekat kampus.
They rented a big house near campus.
Rumah itu besar, tetapi halamannya sempit.
That house is big, but its yard is narrow.
Saya mencari kamar murah untuk dua malam.
I am looking for a cheap room for two nights.
Kamar ini murah dan cukup bersih.
This room is cheap and quite clean.
English changes the surrounding grammar: attributive a big house versus predicative the house is big. Indonesian changes the position, not the adjective. Besar remains besar in both roles.
Postnominal modification
The basic modifier order is noun + adjective:
Kami membeli meja panjang untuk ruang rapat.
We bought a long table for the meeting room.
Dia mengenakan kemeja putih dan celana hitam.
He/She is wearing a white shirt and black trousers.
Restoran baru itu selalu ramai pada akhir pekan.
That new restaurant is always busy on weekends.
Indonesian begins with the category—meja, kemeja, restoran—and then adds the property. English-speaking learners often transfer English pre-noun order, but besar rumah is not the ordinary Standard Indonesian phrase for “big house.” Use rumah besar.
Possessors and demonstratives follow their own noun-phrase order. In rumah besar itu, besar describes the house and itu closes the identifiable phrase. The postnominal-modifier page develops stacking and yang in detail.
Direct adjective predicates: no ordinary “be”
An adjective can head the predicate with no copula:
Kopinya panas; tunggu sebentar sebelum diminum.
The coffee is hot; wait a moment before drinking it.
Jalan di depan pasar sangat sempit.
The road in front of the market is very narrow.
Anak-anak sudah siap berangkat.
The children are ready to leave.
English requires is/are because its finite clauses normally need a verb. Indonesian adjective predicates do not. They behave partly like stative verbs: they can follow a subject directly, take negation, and combine with markers such as sudah “already” and masih “still.”
Do not insert adalah before an ordinary property. Rumah itu adalah besar is not the normal way to say “That house is big.” Adalah belongs mainly to identification and definition (formal), not routine adjective predication. See the adjective-predicate page for aspect, time, and negation.
Describing with yang
Indonesian can also place yang before an adjective:
Kami memilih rumah yang besar karena keluarga kami sering berkunjung.
We chose the large house because our family often visits.
The required phrase rumah yang besar explicitly packages besar as identifying descriptive material. Direct rumah besar is the compact default “big house”; rumah yang besar is useful when selecting or contrasting “the one that is big,” or when the description becomes more complex.
Saya mau kamar yang tenang, bukan yang menghadap jalan.
I want a room that is quiet, not one facing the street.
Buku yang sangat tebal itu belum selesai saya baca.
I have not finished reading that very thick book.
Adding yang mechanically after every noun is not an Indonesian equivalent of English be. It changes how the description is packaged. Full relative-clause analysis belongs on the syntax pages.
Degree compatibility
Many adjectives describe gradable properties. They combine with degree expressions:
| Pattern | Example | Meaning |
|---|---|---|
sangat
| sangat besar | very big |
| adjective + sekali | besar sekali | very big |
lebih
| lebih besar | bigger/more big |
terlalu
| terlalu besar | too big |
Tas ini terlalu berat untuk dibawa sendiri.
This bag is too heavy to carry alone.
Pelayanannya ramah sekali.
The service is very friendly.
Degree compatibility is useful evidence for the adjective phrase: sangat [ramah] and [ramah] sekali form a unit around the property. Not every descriptive word is equally gradable, and lexical meaning still matters; “very wooden” is no more automatically sensible in Indonesian than in English.
No gender or number agreement
Indonesian adjectives do not change for masculine, feminine, singular, or plural referents.
Pria itu tinggi, dan kedua putrinya juga tinggi.
The man is tall, and both of his daughters are tall too.
Mobil baru itu mahal; mobil-mobil lama di belakang lebih murah.
That new car is expensive; the old cars in the back are cheaper.
The forms tinggi, baru, lama, mahal, and murah stay unchanged. Plurality appears through context, numbers, or noun reduplication, not through adjective endings. This differs from languages that require adjective agreement and from English pairs such as this/these, which change a determiner even though the adjective itself does not.
A note on class boundaries
Indonesian word classes do not line up perfectly with English ones. Some property words behave strongly like adjectives; others participate in verbal or nominal derivation. For example, productive affixes can create verbs meaning “make X” or nouns meaning “X-ness.” Those forms must be attached correctly, but their full paradigms are outside this overview.
This is not a reason to treat every content word as interchangeable. Use syntax as evidence: postnominal modification, direct predication, tidak negation, and degree compatibility together identify the central adjective pattern.
Orthography
Write ordinary adjective phrases as separate words: rumah besar, sangat besar, besar sekali. Attach productive affixes in derived words according to EYD V. Hyphenate full reduplication, as in besar-besar. Normal Standard Indonesian examples use no accent marks.
Common Mistakes
1. Putting every adjective before its noun
❌ Mereka tinggal di besar rumah dekat sungai.
Incorrect Standard Indonesian adjective order.
✅ Mereka tinggal di rumah besar di dekat sungai.
They live in a big house near the river.
2. Inserting adalah before an ordinary adjective predicate
❌ Rumah itu adalah besar.
Incorrect ordinary property clause — adjective predicates need no adalah.
✅ Rumah itu besar.
That house is big.
3. Adding plural morphology to the adjective
❌ Rumah-rumah itu besar-besars untuk keluarga kecil.
Incorrect — Indonesian adjectives take no English plural ending.
✅ Rumah-rumah itu besar untuk keluarga kecil.
Those houses are big for small families.
4. Using yang mechanically in a simple phrase
❌ Saya membeli meja yang panjang yang kayu itu.
Incorrect mechanical chaining — yang does not link every modifier.
✅ Saya membeli meja kayu yang panjang itu.
I bought that long wooden table.
5. Moving sekali before the adjective for “very”
❌ Pelayanannya sekali ramah.
Incorrect degree-word order for the meaning ‘very friendly.’
✅ Stafnya ramah sekali.
The staff are very friendly.
Key Takeaways
- One unchanged form serves as modifier and predicate: rumah besar / Rumah itu besar.
- Adjective modifiers normally follow nouns.
- Ordinary adjective predicates take no adalah or English-style be.
- Yang changes information packaging; it is not mechanically required.
- Adjectives accept degree expressions and show no gender or number agreement.
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Start learning Indonesian →Related Topics
- Adjective Predicates and Zero CopulaA1 — Build Indonesian property clauses directly with subject plus adjective, adding aspect, time, or tidak without an ordinary copula.
- Postnominal Adjectives and yangA1 — Place Indonesian adjectives after nouns, and use yang when contrast, complexity, or explicit descriptive packaging calls for it.
- sangat, amat, and sekaliA2 — Intensify Indonesian adjectives with pre-adjective sangat or amat and post-adjective sekali, including emphatic combinations.
- Negating AdjectivesA2 — Choose tidak, belum, or contrastive bukan to distinguish a denied state, an incomplete transition, and a corrected category.
- Adjectival SentencesA1 — Use adjectives as complete predicates with tidak, degree words, aspect markers, and experiencer subjects.
- Order Inside the Noun PhraseA1 — Build Indonesian noun phrases from a head noun toward right-side possessors, descriptions, and demonstratives, with numerals and classifiers before the head.