Regex - how to exclude single word?

Question

I am using http://www.position-absolute.com/articles/jquery-form-validator-because-form-validation-is-a-mess/ for validation. Validation rules are defined in a following way

Answer 1

It's unclear from your question what you want, but I've interpreted it as "not matching input that contains a particular word". The regex for this is:

^(?!.*\bexclude_word\b)