Excluding words using regex without excluding its variants

Question

I am trying to exclude the word ‘define’ without excluding other forms of the word like ‘defined’ or ‘defining’ but the below mentioned regex doesn’t work. Help.

Regex :

^((?!define).)*$

Answer 1

Use word boundaries around the word define:

^((?!\bdefine\b).)*$

You could also write this pattern as:

^(?!.*\bdefine\b).*$

Demo