Dictionary.com
Thesaurus.com
Showing results for gullible. Search instead for Gullible+Fool.
Synonyms

gullible

American  
[guhl-uh-buhl] / ˈgʌl ə bəl /
Or gullable

adjective

  1. easily deceived or cheated.

    Synonyms:
    green, simple, innocent, naive, trusting, credulous

gullible British  
/ ˈɡʌləbəl /

adjective

  1. easily taken in or tricked

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of gullible

First recorded in 1815–25; gull 2 + -ible

Explanation

If you are gullible, the joke is on you because you are easily fooled. It is thought that gullible might be derived from the verb gull, meaning "to swallow." This would be a funny coincidence as gullible describes an overly trusting person who tends to swallow the stories he hears whole. The related word, gull, can be used as a noun "don't be such a gull!" or as a verb "you can't gull me into believing that!"

Keep Reading on Vocabulary.com

Vocabulary lists containing gullible

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Only one of them, Sean “Poopies” McInerney, a surf bro so gullible that I’m not sure he’s capable of informed legal consent, fits into “Best and Last” like a well-worn punching bag.

From Los Angeles Times Jun. 26, 2026

"People say that victims are gullible but the scams are put together well", they are very "sophisticated", said a source close to the investigation.

From Barron's Jun. 5, 2026

Professional and institutional investors turn positive on stocks at the beginning of a bull market, and gradually unload their appreciated equities to more gullible retail investors.

From MarketWatch Mar. 25, 2026

And the message-board-born concept of a “lolcow,” a gullible user who can be goaded into making a fool of themselves on a regular basis, definitely predated the music video.

From Salon Feb. 16, 2026

Just the other week, he bent all his refrigerator magnets and tried to sell them online as miracle medical bracelets to gullible senior citizens.

From "Dog Squad" by Chris Grabenstein

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training