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I know it's possible to match a word and then reverse the matches using other tools (e.g. grep -v). However, is it possible to match lines that do not contain a specific word, e.g. hede, using a regular expression?

Input:

hoho hihi haha hede 

Code:

grep "<Regex for 'doesn't contain hede'>" input 

Desired output:

hoho hihi haha 

I know it's possible to match a word and then reverse the matches using other tools (e.g. grep -v). However, is it possible to match lines that do not contain a specific word, e.g. hede, using a regular expression?

Input:

hoho hihi haha hede 

Code:

grep "<Regex for 'doesn't contain hede'>" input 

Desired output:

hoho hihi haha 

I know it's possible to match a word and then reverse the matches using other tools (e.g. grep -v). However, is it possible to match lines that do not contain a specific word, e.g. hede, using a regular expression?

Input:

hoho hihi haha hede 

Code:

grep "<Regex for 'doesn't contain hede'>" input 

Desired output:

hoho hihi haha 

I know it's possible to match a word and then reverse the matches using other tools (e.g. grep -v). However, is it possible to match lines that do not contain a specific word, e.g. hede, using a regular expression?

Input:

hoho hihi haha hede 

Code:

grep "<Regex for 'doesn't contain hede'>" input 

Desired output:

hoho hihi haha