Translation guide
Describes claims, rumors, or fears that lack evidence or basis. Japanese uses adjectives, verbs, and set phrases to express that something is groundless, baseless, or without foundation.
To say that a claim, rumor, accusation, or fear is not supported by facts or evidence.
The most direct and common way to say 'unfounded'. Literally 'without basis/grounds'. Used for rumors, accusations, fears, etc.
That rumor is unfounded.
To state that something is unfounded, often as a predicate adjective.
A common pattern meaning '~ has no basis'. Replace 〜 with the subject (rumor, fear, etc.).
彼の不安は根拠のないものだった。
His anxiety was unfounded.
A stronger, more formal term meaning 'completely groundless' or 'without any factual basis'. Often used in legal or official contexts.
The accusation turned out to be unfounded.
Means 'nonsensical' or 'baseless', often implying the information is made up or unreliable. More casual than 根拠のない.
Everything he says is unfounded.
Literally 'lacks supporting evidence'. Used when a claim or story has no proof or corroboration.
There is no evidence to support that story.
A more technical or formal synonym for 根拠のない. Less common in everyday speech.
Unfounded criticism should be avoided.
That worry is unfounded.
Means '~ is not based on facts'. More explicit and slightly formal.
The article is unfounded.
completely unfounded report
Do not try to translate 'unfounded' as a single word like 無基礎 (not a word). Use the adjective phrases or patterns above.