Indonesian derives some adjectives with native affix patterns and others with suffixes inherited through older learned vocabulary. These layers are not interchangeable. Kemerah-merahan is transparently approximate and descriptive, while ilmiah and manusiawi belong to restricted lexical families that often carry academic, ethical, religious, or formal associations.
This page explains the adjective-forming results and their register. It leaves lexical vocabulary and complete derivational-affix paradigms to adjacent pages. The crucial limitation is lexical: knowing an affix does not authorize you to coin every imaginable combination.
Derivation is not agreement
Derived adjectives behave like other Indonesian adjectives. They can follow a noun or serve directly as a predicate, and they do not change for number or gender.
Tim itu menerbitkan laporan ilmiah tentang kualitas air sungai.
The team published a scientific report on river-water quality.
Keputusan untuk memberi waktu istirahat tambahan sangat manusiawi.
The decision to give additional rest time is very humane.
Kami memilih bahan alami yang mudah ditemukan di daerah ini.
We chose natural materials that are easy to find in this region.
In laporan ilmiah and bahan alami, the adjective follows its noun. In the second example, manusiawi is the predicate and can take the degree word sangat. None of these forms agrees with an omitted gender or plural category.
English speakers may recognize meanings similar to scientific, natural, and humane, but Indonesian derivational endings are not direct substitutes for English -ic, -al, or -ish.
Approximation with ke-...-an and a copied base
With a limited set of bases—especially colors—the pattern ke- + reduplicated base + -an means “having the property to some degree” or “somewhat resembling the property.”
| Base | Derived adjective | Meaning |
|---|---|---|
| merah | kemerah-merahan | reddish |
| biru | kebiru-biruan | bluish |
| kuning | kekuning-kuningan | yellowish |
| barat | kebarat-baratan | Westernized; imitating Western ways |
Cahaya pagi membuat kabut itu tampak kemerah-merahan.
The morning light made the mist look reddish.
Memar di lengannya masih kebiru-biruan.
The bruise on his/her arm is still bluish.
Kertas lama itu sudah kekuning-kuningan di bagian tepinya.
That old paper has become yellowish around the edges.
The color forms express approximation, not excess: kemerah-merahan is “reddish,” not “too red.” Some noun-based members such as kebarat-baratan often add an unfavorable implication of imitation. That evaluative meaning is lexical and cannot be predicted from the shell alone.
The family is genuinely irregular. Some established approximate color forms occur without a copied base, including kehijauan “greenish,” while keemasan means “golden.” Do not manufacture a matching pair for every color simply to complete a table.
The restricted suffix -i
Adjectival -i occurs in a small learned vocabulary, historically associated especially with Sanskrit- and Arabic-origin material. Common examples include alami “natural,” hewani “animal-based/animal,” insani “human/humane,” and rohani “spiritual.” The boundary is not productive in the way English learners might expect.
Restoran itu menggunakan pewarna alami untuk semua minumannya.
That restaurant uses natural coloring in all its drinks.
Dokter menyarankan sumber protein hewani dan nabati yang seimbang.
The doctor recommends a balanced mix of animal and plant protein sources.
Bantuan rohani tersedia bagi pasien yang memerlukannya.
Spiritual support is available to patients who need it. (formal)
Alami is now ordinary and neutral in phrases about ingredients, processes, and environments. Rohani is common in institutional and religious contexts (formal). The fact that both end in -i does not make their registers identical.
Also distinguish this adjective-forming element from the much broader verbal suffix -i. A word ending in the letters i is not therefore an adjective, and an arbitrary noun cannot be converted into an adjective merely by adding them.
The suffix -wi
The learned suffix -wi appears especially after vowel-final bases in an established set: manusiawi “human/humane,” duniawi “worldly,” surgawi “heavenly,” and gerejawi “ecclesiastical.” This describes a historical and lexical pattern, not a productive pronunciation rule learners can apply freely.
Setiap tahanan berhak diperlakukan secara manusiawi.
Every prisoner has the right to be treated humanely.
Ceramah itu membandingkan kepentingan duniawi dengan tanggung jawab rohani.
The sermon compared worldly interests with spiritual responsibilities. (formal)
Paduan suara itu menciptakan suasana yang hampir surgawi.
The choir created an almost heavenly atmosphere. (literary)
Manusiawi often evaluates conduct, conditions, or limits as humane or fitting for a human being. It does not routinely replace the relational phrase manusia “human” in expressions such as tubuh manusia “the human body.” Duniawi tends to occur in reflective, religious, or formal contrasts with spiritual matters. Surgawi is often (literary).
The suffix -iah
Forms in -iah are prominent in intellectual and institutional vocabulary: ilmiah “scientific/scholarly,” alamiah “natural,” rohaniah “spiritual,” and badaniah “bodily.” Their shapes came through learned borrowing; synchronically, speakers learn them as established Indonesian words.
Kesimpulan ilmiah harus didukung oleh data yang dapat diperiksa.
A scientific conclusion must be supported by verifiable data. (academic)
Perubahan itu berlangsung secara alamiah tanpa campur tangan manusia.
The change occurred naturally without human intervention. (formal)
Peneliti membedakan kebutuhan badaniah dari kebutuhan psikologis.
The researcher distinguishes bodily needs from psychological needs. (academic)
Ilmiah is strongly associated with scholarship, evidence, and method (academic). Alamiah overlaps with alami, but often sounds more learned or conceptual; alami is the everyday choice in bahan alami “natural ingredients.” This is a tendency, not an absolute semantic wall.
Do not analyze ilmiah as though modern speakers had simply attached a freely available -iah to unchanged ilmu. Established loan formations may include conventional stem shapes. The dictionary form is the fact to learn.
Different morphological strata, different flavors
| Stratum | Typical contribution | Example |
|---|---|---|
| ke- + copied base + -an | approximation or resemblance; sometimes evaluation | kemerah-merahan |
| -i | established learned relational adjective | alami |
| -wi | established relational or evaluative adjective | manusiawi |
| -iah | learned, often academic/formal relation | ilmiah |
This comparison is more useful than a single translation “makes an adjective.” The derivations bring semantic and stylistic history with them. A newly needed relation is often expressed with a noun modifier, yang, ber-, or a prepositional phrase instead of a newly coined learned suffix.
For the larger affix system, see ke-...-an formation. The present page deliberately covers only adjective results.
Spelling
Attach suffixes and circumfixes: alami, manusiawi, ilmiah, kemerah-merahan. In the last form, the reduplicated base retains its hyphen inside the derived word. Normal examples use unaccented EYD V spelling.
Common Mistakes
1. Treating a learned suffix as freely productive
❌ Panel pintu itu kayuwi.
Incorrect — -wi cannot be freely added to kayu to create 'wooden.'
✅ Panel pintu itu terbuat dari kayu.
That door panel is made of wood.
2. Separating a suffix from its base
❌ Kondisi kerja itu tidak manusia wi.
Incorrect spelling — manusiawi is one derived word.
✅ Kondisi kerja itu tidak manusiawi.
Those working conditions are inhumane.
3. Using manusiawi for every English human
❌ Museum itu menampilkan model tubuh manusiawi.
Incorrect for 'human body' — manusiawi normally evaluates something as humane or humanly appropriate.
✅ Museum itu menampilkan model tubuh manusia.
The museum displays a model of the human body.
4. Removing the hyphen inside an approximate adjective
❌ Langit sore itu kemerahmerahan.
Incorrect spelling — the copied color base takes a hyphen.
✅ Langit sore itu kemerah-merahan.
The evening sky is reddish.
Key Takeaways
- Kemerah-merahan and related established forms express approximation, not automatically excess.
- -i, -wi, and -iah occur in restricted learned vocabulary; they are not freely interchangeable.
- Alami is common and neutral, manusiawi often evaluative, and ilmiah characteristically academic.
- Borrowed morphological strata carry register and lexical history as well as adjective meaning.
- Attach affixes, retain the reduplication hyphen, and verify each derived adjective as an established word.
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Start learning Indonesian →Related Topics
- Color Terms as Adjectives and NounsA2 — Use Indonesian color words after nouns, as predicates or color names, and build shades with the color head first.
- Adjective ReduplicationB1 — Understand how copied adjectives distribute properties, describe manner, intensify predicates, and form se-...-nya expressions.
- Postnominal Adjectives and yangA1 — Place Indonesian adjectives after nouns, and use yang when contrast, complexity, or explicit descriptive packaging calls for it.
- Adjectives as Nouns with yang and -nyaB2 — Use yang to select an entity by its property, -nya to nominalize a fact or degree, and ke-...-an for established abstract nouns.
- ke-...-an: Formation and AllomorphyB2 — Build ke-...-an words as one circumfixed form, preserving the base and all vowel boundaries in standard spelling.
- Attaching Prefixes and SuffixesA2 — Write ordinary Indonesian affixes solid with lowercase bases and use boundary hyphens around capitalized or acronym bases.