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Editorial Team
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Asked: 2026-06-17T12:02:53+00:00

I want to create a regular expression that finds the word tjuv (thief in

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I want to create a regular expression that finds the word tjuv (thief in swedish), which can be assembled with other words (see below for examples) and/or come in different conjugations.

Examples:

  • cykeltjuv
  • biltjuv
  • tjuvarna
  • inbrottstjuvs

The one below works for tjuv and tjuvs (a thief’s), but what about the other conjugations as well as combinations with other words?

/tjuv(?:s){0,1}/ig

Now that I’ve learned you a little swedish it’s fair that you learn me some regular expressions 😉

EDIT: To be more specific, there’s actually no case I can think of that shouldn’t match with the word tjuv.

What I am doing is searching through phrases where the word tjuv exists, for example (translated to english):

1. När en familj kom hem från en utlandssemester upptäckte de att en inbrottstjuv
   hade varit i farten. <- MATCH!

2. På juldagen hade en cykeltjuv varit framme och stulit en cykel. <- MATCH


3. Violer är blå och rosor är röda <- No 'tjuv' and therefor no match
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1 Answer

  1. Editorial Team

    I think this is what you want, the word "tjuv" with other letters before and/or ahead:

    /[a-z]*tjuv[a-z]*/ig

    See it here on Regexr

    But [a-z] is a character class covering only the ASCII characters a to z (Case independent because of the i modifier). But I think swedish has also some characters that are not included in that range.

    So either you

    • add the missing characters to the character class

    or

    • dependend on your regex flavour you can use \p{L} instead.

      \p{L} is a Unicode code point, matching every letter in any language. Would then look like:

        /\p{L}*tjuv\p{L}*/ig
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