# unsubstantiate

> English word · Verb

## Definitions
1. To prove false; to disprove or discredit.
2. To officially categorize (an allegation) as unsubstantiated.
3. To call into question; to create doubt about.
4. To make insubstantial or abstract; unsubstantialize.

## Etymology
From un- + substantiate.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/unsubstantiate