What does disbelieve mean?
"Disbelieve" is a transitive verb meaning to refuse to believe that something is true, or to lack trust in what someone says. It attaches directly to an object — you disbelieve a claim, a witness, or a story — whereas the related noun "disbelief" names the state of mind produced by that refusal. The word carries a somewhat formal, measured tone: rather than accusing someone of lying outright, to disbelieve them is to withhold acceptance, which makes it common in journalism, legal writing, and careful argument. It frequently appears in negative constructions like "I had no reason to disbelieve him," conveying cautious open-mindedness. Formed in early modern English from the prefix "dis-" added to "believe," it belongs to a family including disbelief, disbeliever, and disbelieving. Its ancient roots run deeper than the prefix suggests: "believe" descends from an Old English verb ultimately tied to a Germanic root shared with "love."
verbTo refuse to believe or accept that something is true; to have no faith or confidence in the truth of a statement, claim, or person.
- To reject as untrue or untruthful; to refuse to accept something as real or credible (e.g. "I disbelieved his excuse").
"The jury found it hard to disbelieve a witness with such a consistent account."
"She had every reason to disbelieve the salesman's promises after being burned twice before."
"Historians now disbelieve many of the legends recorded in the medieval chronicles."
Add "dis-" to one of English's most basic verbs and you get a word whose oldest cousins include "love" — believe and love share the same ancient Germanic root.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of disbelieve
"Disbelieve" was formed within English by adding the negative prefix "dis-" to "believe," first appearing in the late sixteenth century. The base verb "believe" comes from Old English "gelēfan," descended from a Proto-Germanic root *leubh- meaning "to hold dear" or "to love," which also gave English "love" and the archaic "lief" (dear, gladly), along with German "lieben" and Dutch "geloven." Thus the modern act of disbelieving is built on a root whose original sense concerned affection and attachment rather than truth.
Related word forms
How disbelieve is actually used
Slightly more formal than "not believe" or "doubt"; common in written English, journalism, and legal contexts. Often used in negative constructions such as "I have no reason to disbelieve you," where it signals polite withholding of judgment rather than outright rejection.
Easily confused with disbelieve
"Disbelief" is the noun meaning the state or feeling of not believing, while "disbelieve" is the verb describing the act itself.