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Mumpsimus: meaning, pronunciation and examples

Mumpsimus noun. A mistaken habit or belief that someone clings to even after being shown it is wrong.

How to say it

MUMP-sih-muss/ˈmʌmpsɪməs/

3 syllables, stressed on the first (MUMP).

Mumpsimus in a sentence

Insisting that emails be printed before he reads them is the boss's last mumpsimus.

It's a mumpsimus that you can't swim after lunch, but Mum still enforces it.

Similar and opposite

Similar:

  • obstinacy
  • fixed idea
  • bad habit

Where mumpsimus comes from

From a tale of a priest who misread sumpsimus in the Latin Mass as mumpsimus and refused to change.

Test yourself

Which word fills the gap?

It's a _____ that you can't swim after lunch, but Mum still enforces it.

  • mumpsimus
  • dottle
  • quidnunc
Show the answer

mumpsimus: It's a mumpsimus that you can't swim after lunch, but Mum still enforces it.