Your idea is absolutely infeasible.
Source: tatoeba (10305438)
Ranked by relevance and common usage.
Keep "infeasible" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
If two options seem close, choose the one that best matches the audience and purpose of the sentence.
Choose a synonym only if it keeps the core idea of "infeasible" intact in the sentence you are editing.
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Read the full sentence after the swap. Keep the synonym only when the sentence becomes clearer or more precise.
Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
After choosing a replacement for "infeasible", read the sentence once for meaning and once for rhythm. The best synonym should feel natural in the full sentence, not only accurate in a word list.
If the synonym makes the sentence slower, vaguer, or more dramatic than intended, keep "infeasible" or choose a simpler alternative from the closest-match group.
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4 total sentences available.
Your idea is absolutely infeasible.
Source: tatoeba (10305438)
Rural electrification was finally coming, even though for years nay-sayers had said it was economically infeasible.
Source: tatoeba (11338885)
"With magic in limited use and hidden, it was possible to enhance the various magic resistances of humans, and to keep certain forms of magic from being possible. If magic enters common usage, this interference becomes infeasible."
Source: wiktionary
Labour's Shadow Transport Secretary Louise Haigh said: "There is a cost-of-living crisis, and the Prime Minister blew nearly £1m of public money on an utterly infeasible vanity project. That's enough to fill 18,000 potholes. This shows the Tories' sheer disrespect for public money."
Source: wiktionary
Closest matches include impracticable, unworkable, impossible, impractical, improbable.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.