Unfeasible Or Infeasible is a common word confusion in English. Many people wonder which term sounds more correct in writing and speech. Both words describe something that cannot be done easily or successfully. However, one word is far more common in modern English.
This confusion happens because both words look similar and carry almost the same meaning. Writers, students, and professionals often use them interchangeably. Still, there are small differences in tone, popularity, and usage.
Knowing the right choice can improve your grammar and make your writing sound more natural. In this guide, you will learn the meaning, history, usage, and differences between “unfeasible” and “infeasible” in simple English.
⭐ Quick Answer
“Infeasible” is the more common and preferred word in modern English. Both “unfeasible” and “infeasible” mean “not possible” or “not practical,” but “infeasible” sounds more natural in formal and professional writing.
Example:
- ✅ The plan is infeasible because of the high cost.
- ✅ The idea became unfeasible after the deadline changed.
📖 Meaning of Unfeasible
Unfeasible means something is difficult or impossible to achieve.
Examples:
- The project became unfeasible after the budget cuts.
- Traveling daily from that distance is unfeasible.
📖 Meaning of Infeasible
Infeasible means something cannot realistically be done or completed.
Examples:
- Building the bridge in two weeks is infeasible.
- The schedule looked infeasible from the start.
📊 Key Differences Table
| Feature | Unfeasible | Infeasible |
|---|---|---|
| Meaning | Not practical or possible | Not practical or possible |
| Tone | Less common | More formal and natural |
| Usage | Rare in modern English | Widely used |
| Popularity | Lower | Higher |
| Preferred in business writing | Sometimes | Yes |
🕰️ Origin & History
The word feasible comes from French and Latin roots meaning “possible to do.”
- Infeasible formed with the prefix in-
- Unfeasible formed with the prefix un-
Over time, English speakers preferred infeasible because it matched other formal words like:
- Incomplete
- Inaccurate
- Inactive
“Unfeasible” still exists, but it appears less often in modern writing.
🇬🇧 British English vs American English Spelling
Both British and American English accept infeasible and unfeasible. However, “infeasible” is more common in both regions. Professional writing, academic papers, and business communication usually favor “infeasible.”
Comparison Table: British vs American English
| English Style | Preferred Word |
|---|---|
| British English | Infeasible |
| American English | Infeasible |
| Australian English | Infeasible |
| Canadian English | Infeasible |
✍️ When to Use Each Word
Use “Infeasible” ✅
Use infeasible in:
- Academic writing
- Business reports
- Formal communication
- Technical documents
Examples:
- The company found the proposal infeasible.
- Completing the task today is infeasible.
Use “Unfeasible” ✅
Use unfeasible in:
- Casual speech
- Informal writing
- Creative content
Examples:
- The road trip became unfeasible in winter.
- Buying that house feels unfeasible now.
❌ Common Mistakes
| Incorrect Usage | Correct Usage |
|---|---|
| This plan is very infeasible to happen. | This plan is infeasible. |
| The idea is not feasible and infeasible. | The idea is infeasible. |
| Unfeasible is always wrong. | Unfeasible is less common, not wrong. |
| Infeasible means illegal. | Infeasible means impractical or impossible. |
🧠 Easy Trick to Remember
Remember This Tip:
- Infeasible = Professional
- Unfeasible = Uncommon
If you are unsure, choose infeasible. It sounds more natural in most situations.
📝 write 5 examples
1. Business Meeting Example
The manager said the new marketing strategy was infeasible because of budget limits.
2. Travel Planning Example
Driving across the country in one day seemed unfeasible.
3. School Project Example
Finishing the assignment overnight became infeasible for the students.
4. Family Budget Example
Buying a luxury car felt unfeasible after the price increase.
5. Technology Example
The engineers considered the design infeasible with current technology.
🔍 Related Keywords
- feasible meaning
- infeasible meaning
- unfeasible definition
- feasible vs infeasible
- impossible vs infeasible
- impractical meaning
- grammar confusion words
⚖️ Final Verdict
Both unfeasible and infeasible are correct English words. However, infeasible is the better choice in most cases. It appears more often in formal writing, business communication, and academic content.
Use unfeasible only when writing casually or creatively. If you want your writing to sound professional and natural, choose infeasible.
📈 Google Trends & Usage Data
In countries like the USA, UK, Australia, India, and Pakistan, the word infeasible appears much more often in online searches and published writing. Search trends show that professionals and students strongly prefer “infeasible.”
“Unfeasible” still gets searches, but its usage remains lower worldwide. The difference is especially noticeable in academic and technical writing.
Comparison Table: Keyword Variations
| Keyword Variation | Popularity |
|---|---|
| Infeasible | Very High |
| Unfeasible | Medium |
| Not feasible | High |
| Impossible | Very High |
| Impractical | High |
FAQs ;
Is “unfeasible” correct?
Yes, “unfeasible” is correct English, but it is less common.
What is the difference between unfeasible and infeasible?
Both mean “not possible,” but “infeasible” is more widely used.
Which is more common?
“Infeasible” is much more common worldwide.
Which word is better for formal writing?
“Infeasible” is the preferred choice for formal and professional writing.
Why does this confusion exist?
The confusion exists because both words have the same meaning and similar structure.
📝 Conclusion
Understanding Unfeasible Or Infeasible can improve your writing and grammar skills. Both words mean something is not practical or impossible to achieve. However, “infeasible” is the more popular and professional option in modern English.
Most business documents, academic papers, and formal conversations use “infeasible.” Meanwhile, “unfeasible” appears less often and sounds more informal. If you want safe and natural wording, choose “infeasible.”
The key is consistency and context. Use the word that best matches your audience and writing style.
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