What does gullible mean?
Gullible describes a person who is easily deceived, manipulated, or persuaded by claims, promises, and appearances. It is more than simply inexperienced: the word implies excessive trust and insufficient skepticism, so using it often makes a judgment about someone’s judgment. In conversation, gullible may be relatively neutral in familiar or teasing contexts but more critical in news, education, and consumer-protection discussions. The adjective appears regularly in descriptions of consumers, investors, audiences, and victims of scams, where it highlights a mismatch between confidence and evidence. Its usefulness lies in identifying a recognizable failure of skepticism without requiring technical language. Although gullible is sometimes treated as an insult, it can also be used neutrally to analyze persuasion and risky decision-making. The word is understood in British and American English and derives from the older verb gull, meaning to deceive or trick.
adjectiveEasily deceived or manipulated; excessively trusting and willing to believe others without sufficient skepticism.
- Easily deceived, manipulated, or persuaded because of excessive trust.
"The scam targeted gullible customers who were promised free vacations."
"Some people are too gullible to question implausible claims made by advertisers."
"The fraudster relied on the victim being gullible and willing to trust strangers."
Gullible sounds as though it comes from a seabird, but its real ancestor is the verb gull, meaning to deceive or trick.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does gullible come from?
Gullible was formed in the late 19th century from the older verb gull, meaning to deceive or trick, and the suffix -ible, denoting the capacity or tendency to be affected in a particular way. The gull in this formation is not simply the name of the seabird; it belongs to an older vocabulary of deception. Related forms such as gullish and gullery continue the same root in other senses.
Related word forms
How gullible is actually used
In everyday British and American English. It is often mildly critical or insulting, but it may also be used neutrally when analyzing persuasion, advertising, or susceptibility to fraud.
Easily confused with gullible
Gullible means easily deceived, whereas guileless means innocent, sincere, and lacking cunning or deceptive intent.