Definition

Not supported by evidence or proof; lacking confirmation.

Example

The claims made in the report were unsubstantiated and could not be verified.

Conversation

Did you hear the latest rumors about the project?

Yeah, but I think most of them are just unsubstantiated gossip.

Exactly, it’s hard to take anything seriously without proof.

Right! I prefer to wait for official news before believing any of it.

Synonyms & Antonyms

Root Explanation

Unsubstantiated → It is formed from "un-" (meaning not), "substantiate" (from Latin "substantiare", meaning to establish or give substance to), and the suffix "-ed" (indicating a past participle). The word means not having been established or given substance, often referring to claims or assertions that lack evidence.

Memory Tip

Think of 'not' ('un-') giving 'substance' ('substantiate') to something — when something is unsubstantiated, it means it lacks the necessary evidence or foundation.

Visually Confused Words