Definitions

fail

[feyl] / feɪl /

VERB

be unsuccessful

Synonyms

STRONGEST

break down decline fall

STRONG

abort backslide blunder deteriorate fizzle flop flounder fold founder miscarry miss slip

WEAK

back wrong horse be defeated be demoted be found lacking be in vain be ruined come to naught come to nothing fall flat fall short fall through go astray go down go down swinging go downhill go up in smoke go wrong hit bottom hit the skids lose control lose out lose status meet with disaster miss the boat play into run aground turn out badly

Antonyms

STRONGEST

ascend go up rise

STRONG

accomplish achieve build correct develop do well succeed

WEAK

capture complete deliver earn finish gain merit obtain procure prosper reach win

VERB

abandon, forsake

Synonyms

STRONGEST

ignore neglect

STRONG

abort blink desert disappoint discount disregard fault forget funk miscarry omit overlook slight slip

WEAK

back out break one's word go astray let down overpass

Antonyms

STRONG

attend pay attention regard remember respect

WEAK

accomplish achieve capture complete deliver earn finish gain merit obtain procure prosper reach succeed win

VERB

lose money

Synonyms

STRONGEST

break close drop end finish

STRONG

crash defalcate default dishonor fold overdraw repudiate terminate

WEAK

be cleaned out be in arrears be ruined be taken to the cleaners become insolvent close down close one's doors drop a bundle go bankrupt go belly up go broke go bust go into Chapter 11 go out of business go to the wall go under go up lose big lose one's shirt

Antonyms

STRONGEST

begin commence continue start

WEAK

accomplish achieve capture complete deliver earn gain merit obtain procure prosper reach succeed win

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.

While these treatments have helped many patients, a significant number either fail to respond or eventually develop resistance.

From Science Daily • Jun. 9, 2026

Without fail, the miniature version of me would blubber at Sully the polka dot monster reuniting with Boo, and Marlin the clownfish traversing the ocean to find his son.

From Salon • Jun. 6, 2026

Such errors have led to the faulty identification of “longevity zones,” areas where supposedly everyone lives longer due to lifestyle or location—but where subsequent studies fail to substantiate the claims.

From The Wall Street Journal • Jun. 5, 2026

Among the myriad of English plans to fail down under was the idea of hitting the Aussies with high pace and hostility.

From BBC • Jun. 4, 2026

The problem wasn’t that Lehman Brothers had been allowed to fail.

From "The Big Short" by Michael Lewis

fail

Example Sentences

Related Words