A Common Academic Adjective Groups
Many academic adjectives are formed by adding suffixes to nouns or verbs. Recognizing these endings will help you understand unfamiliar vocabulary, expand your academic vocabulary, and write more precisely. Instead of memorizing hundreds of adjectives individually, learn the most common word families.
| Ending | Meaning | Examples |
|---|---|---|
| -al | related to | environmental, cultural, educational |
| -ic | related to | scientific, economic, historic |
| -able / -ible | can be | reliable, available, accessible |
| -ive | having the quality of | effective, productive, innovative |
| -ous | full of / having | dangerous, famous, generous |
| -ful | full of | useful, successful, meaningful |
| -less | without | careless, useless, harmless |
- The researchers proposed an innovative solution.
- The report examined several environmental issues.
- The findings provided reliable evidence.
- The university offers accessible learning resources.
- The organization developed a successful strategy.
- The policy had serious economic consequences.
Tip: When you encounter an unfamiliar adjective, look at its ending. The suffix often gives you a clue about its meaning.
For example:
-able often means "can be".
available = can be obtained
reliable = can be trusted
-less usually means "without".
harmless = without harm
careless = without care
✓ an effective strategy
✓ a scientific study
✓ an accessible website
✗ an effect strategy
✗ a science study
✗ an access website
Learning common adjective endings is one of the fastest ways to build your academic vocabulary and improve your reading comprehension.
B Participle Adjectives (-ed / -ing)
Many advanced adjectives end in -ed or -ing. Although these adjectives come from verbs, they describe either a person's reaction or the person, object, or situation that causes the reaction. Participle adjectives are extremely common in academic writing, professional communication, research reports, and presentations. Using the correct form makes your writing more natural and precise.
-ing → describes the person, thing, or situation causing the feeling
| -ed Adjective | -ing Adjective |
|---|---|
| concerned | concerning |
| interested | interesting |
| motivated | motivating |
| confused | confusing |
| encouraged | encouraging |
- The researchers were encouraged by the positive results.
- The results were encouraging.
- Many students became interested in environmental science.
- The lecture was highly interesting.
- The committee appeared concerned about the findings.
- The rapid increase in costs was concerning.
- The participants remained motivated throughout the project.
- The study produced encouraging evidence for future research.
- Several reviewers were confused by the original methodology.
- The revised procedure was less confusing.
Tip: Ask yourself one question:
"Who has the feeling?"
If it is a person, use an -ed adjective.
If it is the thing causing the feeling, use an -ing adjective.
✓ The researchers were interested in the results.
✓ The results were interesting.
✓ The committee was concerned about the proposal.
✗ The researchers were interesting in the results.
✗ The results were interested.
✗ The committee was concerning about the proposal.
When proofreading your writing, always check whether you are describing the person experiencing the feeling or the thing creating it.
C Advanced Adjective Order
When more than one adjective describes a noun, English usually follows a natural order. Although native speakers rarely think about these rules, following the correct order makes your English sound more fluent, more natural, and more professional. Academic and professional writing generally uses fewer adjectives than everyday English, but when several adjectives appear together, they normally follow the standard order.
- a valuable large international research project
- an innovative new medical device
- a beautiful old French building
- a small round wooden table
- an effective online learning platform
- a modern steel office building
- ✓ an innovative new educational program
- ✗ a new innovative educational program
- ✓ a beautiful old Italian village
- ✗ an Italian beautiful old village
- ✓ a large modern glass office building
- ✗ a glass modern large office building
Tip: In advanced English, adjective order helps your writing sound natural rather than translated. You do not need to use every category. Simply place each adjective in its normal position.
Opinion → Size → Age → Shape → Colour → Origin → Material → Purpose → Noun
✓ an interesting old scientific article
✓ a large modern Canadian university
✓ a beautiful small wooden bridge
✗ an scientific interesting old article
✗ a Canadian modern large university
✗ a wooden beautiful small bridge
In formal writing, avoid using too many adjectives. Choose only the ones that add meaningful information.
D Key Points to Remember
Advanced adjectives make your English more precise, more objective, and more professional. Rather than simply describing people or things, they help explain research, evidence, arguments, policies, and academic ideas. Using accurate adjectives improves both your writing and speaking, especially in formal and academic situations.
Adjective + Noun
Be / Linking Verb + Adjective
Perfect + Adjective
Opinion → Size → Age → Shape → Colour → Origin → Material → Purpose → Noun
- Choose specific academic adjectives instead of general words such as good, bad, or nice.
- After be and other linking verbs, use an adjective, not an adverb.
- Many academic adjectives belong to word families such as -al, -ic, -ive, -able, and -ous.
- Use -ed adjectives for people's reactions and -ing adjectives for the thing causing the reaction.
- When using several adjectives, follow the standard adjective order to make your writing sound natural.
- The study produced reliable evidence.
- The results appear significant.
- The findings have been consistent across several studies.
- The committee was concerned about the proposal.
- The proposal was encouraging for future research.
- The university launched an innovative new educational program.
Final Tip: Before you finish writing, ask yourself these questions:
1. Is my adjective precise enough? Replace general words with more specific academic vocabulary whenever possible.
2. Am I using an adjective after a linking verb? After verbs such as be, appear, become, remain, or seem, use an adjective.
3. Am I describing a person's reaction or the cause? Use -ed for the person and -ing for the thing causing the feeling.
4. If I have several adjectives, are they in the correct order? Follow the standard sequence: Opinion → Size → Age → Shape → Colour → Origin → Material → Purpose → Noun
The strongest academic writing uses clear, accurate, and purposeful adjectives—not simply more adjectives.