Failed vs Malfunctioned

When to use each in English, with meaning, register, and examples.

Failed

Top 1,000 (very common)B2adjective

Malfunctioned

Beyond 10,000 (less common)
Most common: Failed
 FailedMalfunctioned
Pronunciation🇬🇧 /["/feɪld/"]/🇺🇸 /["/feɪld/"]/🇬🇧 //mælˈfʌŋkʃənd//🇺🇸 //mælˈfʌŋkʃənd//
Meaningnot successfulDid not work properly.
Examplea failed writerThe printer malfunctioned during the big presentation.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Beyond 10,000 (less common)
CEFR levelB2-
Part of speechadjective
Collocationsfailed attempt, failed experiment, failed project, failed to meet, failed gradesmalfunctioned device, malfunctioned equipment, malfunctioned system
Antonymssucceeded, achieved, triumphedfunctioned, operated, worked
Common mistakesConfusing 'failed' with 'fail' (incorrect verb tense), Using 'failed' with the wrong object (e.g., 'failed the test' instead of 'failed in the test'), Overusing it in informal contexts where lighter terms would be more appropriateConfused with 'malfunction' as a noun instead of an adjective., Using it to describe a person instead of a device., Incorrect verb forms like 'malfunctions' instead of the past tense 'malfunctioned'.
Usage notesUse 'failed' to describe attempts that did not succeed. It's neutral and can be used in various contexts, from academic to casual conversations.Use 'malfunctioned' to describe machines or systems that failed. It is suitable in technical contexts but less used in casual conversation.

See it in real clips

Failed
Malfunctioned

Frequently asked questions: Failed vs Malfunctioned

What's the difference between Failed and Malfunctioned?

Failed: not successful Malfunctioned: Did not work properly.

Which is more common: Failed and Malfunctioned?

Failed is the most common in everyday English.

Can you show an example of each?

Failed: a failed writer Malfunctioned: The printer malfunctioned during the big presentation.

Can I use Failed and Malfunctioned interchangeably?

Not always. Failed and Malfunctioned are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.