Meanings
unsubstantiated1
comparative more unsubstantiated · superlative most unsubstantiated
- Lacking substantiation; without evidence.
Such hedging is necessitated by the lack of in-depth knowledge of the contents, which also gives free rein to the scripting of unsubstantiated factoids concerning the book.
2018, James Lambert, “Setting the Record Straight: An In-depth Examination of Hobson-Jobson”, in International Journal of Lexicography, volume 31, number 4, →DOI, page 487Synonyms: baseless, idle, footless, groundless, unfounded, ungrounded, unjustified, unproved
unsubstantiated2
- participlepastsimple past and past participle of unsubstantiate
Synonyms & antonyms
adjectiveLacking substantiation; without evidence.
More synonyms by meaning
adjectiveunsupported by other evidence
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
unsubstantiated · adjective
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Germanic*un-
- Proto-West Germanic*un-
- Old Englishun-
- Middle Englishun-
- Englishun-
- Englishsubstantiated
- Englishunsubstantiated
From un- + substantiated.
Full word history & related roots →Translations
Bulgarian непотвърден, необоснован
- непотвърден (nepotvărden)lacking substantiation
- необоснован (neobosnovan)lacking substantiation
Chinese Mandarin 未经证实的
- 未经证实的lacking substantiation
Czech nepodložený
- nepodloženýlacking substantiation
German unbewiesen, unbegründet
- unbewiesenlacking substantiation
- unbegründetlacking substantiation
Greek αβάσιμος
- αβάσιμος (avásimos)lacking substantiation
Italian infondato, non comprovato
- infondatolacking substantiation
- non comprovatolacking substantiation
Russian бездоказа́тельный, необосно́ванный
- бездоказа́тельный (bezdokazátelʹnyj)lacking substantiation
- необосно́ванный (neobosnóvannyj)lacking substantiation
Swedish obefogad
- obefogadlacking substantiation
Cite this entry
unsubstantiated. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/unsubstantiated
“unsubstantiated.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/unsubstantiated. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “unsubstantiated,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/unsubstantiated.
Source: unsubstantiated on Wiktionary, CC BY-SA 4.0.