Quick Definition
Feasible (adjective) describes a plan, idea, or solution that is possible to carry out in a practical, realistic way — given the time, money, and resources available.
Example: "It is simply not feasible to finish the whole project in one week."
What Does Feasible Mean?
The word feasible comes from the Old French faisable ("able to be done"), from the Latin facere ("to do" or "to make"). It entered English in the 15th century. At its heart, feasible answers a simple question: can this actually be done?
Feasible goes a step beyond merely "possible." Something is feasible if it can be done in a sensible, realistic way using the resources, time, and conditions that are actually available. It is a key word in business, engineering, science, and planning — fields where people must judge whether an idea is workable before committing money or effort.
Key point: many things are possible in theory but not feasible in practice. A project might be technically possible but too expensive, too slow, or too risky to be feasible. That practical, real-world judgement is what makes feasible such a useful and precise word.
Example Sentences
| Sentence | Level / Note |
|---|---|
| It is simply not feasible to finish the whole project in one week. | B2 — workplace / neutral register |
| The committee asked whether a cheaper option was feasible. | B2 — meetings / planning |
| Solar power is now a feasible alternative to fossil fuels in many regions. | B2 — science / journalism |
| Engineers confirmed that the tunnel was technically feasible but very costly. | C1 — engineering / formal register |
| Before approving the budget, the board commissioned a feasibility study. | C1 — business / formal register (noun form) |
Word Family
Adjective
feasible
"A feasible plan."
Noun
feasibility
"A feasibility study."
Adverb
feasibly
"It can feasibly be done."
Antonym
unfeasible
"An unfeasible deadline."
Synonyms & Antonyms
Synonyms
- viable — able to work successfully
- practical — sensible and likely to work
- achievable — able to be done
- workable — capable of being carried out
- realistic — sensible and possible in the real world
Antonyms
- unfeasible — not possible to do practically
- impractical — not sensible to carry out
- impossible — not able to be done at all
- unrealistic — not sensible given the situation
- unworkable — unable to function or succeed
Common Collocations
- a feasible plan / option / solution — "We need a feasible solution by Monday."
- technically feasible — "The design is technically feasible."
- economically / commercially feasible — "The mine is no longer economically feasible."
- perfectly feasible — "Working from home is perfectly feasible for this role."
- not feasible — "A full refund is not feasible at this stage."
- feasibility study / report — "They ordered a feasibility study." (noun form)
Related Words
Practise This Word
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Frequently Asked Questions about “feasible”
What does feasible mean in English?
Feasible means possible to do or achieve in a practical way. A feasible plan or idea can realistically be carried out with the time, money, and resources available. For example: 'It is not feasible to finish the whole project in one week.' The word is common in business, engineering, and planning, where people ask whether a proposal is actually workable, not just possible in theory.
How do you pronounce feasible?
Feasible is pronounced /ˈfiːzəbl/. It has three syllables: FEE-zuh-buhl. The main stress falls on the first syllable: FEE. The 's' makes a /z/ sound, as in 'zoo', not an 's' sound. Say it slowly: FEE... zuh... buhl. A common mistake is to say 'FEZ-ible' — the first vowel is a long 'ee'.
What is the CEFR level of feasible?
Feasible is a B2 (Upper-Intermediate) level word. It appears regularly in business reports, project planning, academic writing, and discussions of practical solutions. B2 learners are expected to use feasible to talk about whether plans and ideas are realistic, rather than only saying 'possible'.
What are synonyms for feasible?
Synonyms for feasible include: practical (sensible and likely to work), viable (able to work successfully), achievable (able to be done), workable (capable of being carried out), and realistic (sensible and possible in the real world). Feasible often stresses that something can be done given current resources and conditions, not just that it is theoretically possible.
What are antonyms of feasible?
Antonyms of feasible include: unfeasible (not possible to do practically), impractical (not sensible or realistic to carry out), impossible (not able to be done), unrealistic (not sensible given the real situation), and unworkable (unable to function or succeed). You might contrast: 'The first plan was unfeasible, but the revised version is perfectly feasible.'
What is the noun form of feasible?
The noun form is feasibility (/ˌfiːzəˈbɪlɪti/): 'They carried out a feasibility study before approving the budget.' The phrase 'feasibility study' is very common in business and engineering. The adverb is feasibly: 'The work can feasibly be completed by Friday.' There is no verb form.
What are common collocations with feasible?
Common collocations with feasible include: a feasible plan, a feasible option, a feasible solution, technically feasible, economically feasible, commercially feasible, perfectly feasible, and not feasible. With the noun form you will see 'feasibility study', 'feasibility report', and 'assess the feasibility'.
What is the difference between feasible and possible?
Possible means something can happen at all; feasible means it can be done in a practical, sensible way with the resources you have. Many things are possible in theory but not feasible in practice. For example, it is possible to walk from London to Edinburgh, but it may not be feasible in a single day. Feasible adds the idea of practicality, cost, and effort.
What is a feasibility study?
A feasibility study is an assessment carried out before a project begins to decide whether it is practical and worth doing. It examines costs, time, resources, risks, and likely benefits to judge whether the plan is feasible. Feasibility studies are standard in business, construction, and engineering, and the result usually states whether a project is feasible, partly feasible, or unfeasible.
How can I practise the word feasible on LexFizz?
Use LexFizz's Flash Cards to practise feasible alongside related B2 adjectives like viable and practical. The Vocabulary Quiz presents feasible in planning and business contexts so you learn how it differs from 'possible', and the Wordsearch helps you fix the spelling — note the /z/ sound from the 's'. Try writing two sentences: one about a feasible plan and one using 'feasibility study'.