Regular Expressions 101

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/
(?!barna).(?!erne).(?!ene).(?!en).. (?:sin|vår)e(?:$| (?!egen|egne))
/
gm
Negative Lookahead
(?!barna)
Assert that the Regex below does not match
barna matches the characters barna literally (case sensitive)
. matches any character (except for line terminators)
Negative Lookahead
(?!erne)
Assert that the Regex below does not match
erne matches the characters erne literally (case sensitive)
. matches any character (except for line terminators)
Negative Lookahead
(?!ene)
Assert that the Regex below does not match
ene matches the characters ene literally (case sensitive)
. matches any character (except for line terminators)
Negative Lookahead
(?!en)
Assert that the Regex below does not match
en matches the characters en literally (case sensitive)
. matches any character (except for line terminators)
. matches any character (except for line terminators)
matches the character literally (case sensitive)
Non-capturing group
(?:sin|vår)
e
matches the character e literally (case sensitive)
Non-capturing group
(?:$| (?!egen|egne))
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
gm

Test String