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Word of the Day Tuesday, June 9, 2026

unsubstantiated

/ˌʌnsəbˈstænɪˌeɪtɪd/ adjective · British & US
Valid in UKValid in US
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What does unsubstantiated mean?

adjective

Not supported by evidence or proof; lacking substance or foundation.

Example

"The unsubstantiated claims made by the company led to a loss of investor confidence."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for unsubstantiated

Antonyms of unsubstantiated

Rhymes with unsubstantiated

Etymologically related