Unsubstantiated — Meaning, Definition & Synonyms

adjective /ˌən-səb-ˈstan(t)-shē-ˌā-təd/ un·sub·stan·ti·at·ed

Meaning & Definition of Unsubstantiated

Unsubstantiated (adjective)

  1. not proven to be true, not substantiated

Unsubstantiated (adjective) — Senses, Synonyms & Antonyms

  1. having no basis in reason or fact

    "an unsubstantiated claim that was thrown out of court"

    similar: baseless, foundationless, groundless, invalid, nonvalid, unfounded, unreasonable, unsupported, unwarranted
    related: illogical, irrational, nonlogical, unconscionable, unsound, fallacious, false, misled, wrong, gratuitous, uncalled-for, unnecessary, flimsy, implausible, misleading, specious, unconvincing, untenable, weak, ill-advised, unreasoned, inconsistent, absurd, asinine, brainless, crackpot, crazy, fatuous, foolish, half-witted, harebrained, meaningless, nonsensical, preposterous, senseless, silly, simpleminded, stupid, unwise, insane, mad, nutty, wacky
    opposite: good, hard, just, justified, reasonable, reasoned, substantiated, valid, well-founded, well-grounded
    near: certified, validated, verified, confirmed, corroborated, informed, logical, rational, commonsense, sane, sensible, sober, wise, actual, genuine, real, true, certain, sure, clear, cogent, compelling, convincing, credible, persuasive, plausible, satisfying, solid, sound

Synonyms, Thesaurus & Another Word for Unsubstantiated

The most common words with a similar meaning to Unsubstantiated:

baseless, foundationless, groundless, invalid, nonvalid, unfounded, unreasonable, unsupported, unwarranted

Antonyms & Opposite Words for Unsubstantiated

Words with the opposite meaning of Unsubstantiated:

good, hard, just, justified, reasonable, reasoned, substantiated, valid, well-founded, well-grounded

Related Words for Unsubstantiated

illogical, irrational, nonlogical, unconscionable, unsound, fallacious, false, misled, wrong, gratuitous, uncalled-for, unnecessary, flimsy, implausible, misleading, specious, unconvincing, untenable, weak, ill-advised, unreasoned, inconsistent, absurd, asinine, brainless, crackpot, crazy, fatuous, foolish, half-witted

Near Antonyms of Unsubstantiated

certified, validated, verified, confirmed, corroborated, informed, logical, rational, commonsense, sane, sensible, sober, wise, actual, genuine, real, true, certain, sure, clear, cogent, compelling, convincing, credible, persuasive, plausible, satisfying, solid, sound

Origin & Etymology of Unsubstantiated

First known use: circa 1775

Frequently Asked Questions about Unsubstantiated

What does "Unsubstantiated" mean?

"Unsubstantiated" means not proven to be true, not substantiated. As an adjective, it is defined as: not proven to be true, not substantiated.

What is another word for "Unsubstantiated"?

Other words for "Unsubstantiated" include baseless, foundationless, groundless, invalid, nonvalid, unfounded, unreasonable and unsupported. The best synonym depends on which meaning of "Unsubstantiated" you intend.

What are different ways to say "Unsubstantiated"?

There are 52 words and phrases with a similar meaning to "Unsubstantiated". Common alternatives include baseless, foundationless, groundless, invalid, nonvalid, unfounded, unreasonable, unsupported and unwarranted.

What is the opposite of "Unsubstantiated"?

Antonyms of "Unsubstantiated" include good, hard, just, justified, reasonable, reasoned, substantiated and valid. Near antonyms include certified, validated, verified and confirmed.

How do you use "Unsubstantiated" in a sentence?

Examples of "Unsubstantiated" in a sentence: "an unsubstantiated claim that was thrown out of court".

Is "Unsubstantiated" a noun, verb, or adjective?

"Unsubstantiated" is an adjective.

How do you pronounce "Unsubstantiated"?

"Unsubstantiated" is pronounced /ˌən-səb-ˈstan(t)-shē-ˌā-təd/ and divided into syllables as un·sub·stan·ti·at·ed.

What is the origin of the word "Unsubstantiated"?

First known use: circa 1775.