Regex that excludes specified substring

I need to write a regex validation that would pass text that DOESN'T contain a specified substring. For example, given five strings:

Arrowhead
Arrival
Parrot
Rowland
Melrow

This regex should pass all of them who don't contain ROW. So the proposed filtered output would be :

Arrival
Parrot


How can I do this in the most elegant way?

Thanks.

It's far easier to search for the substring and place a not in your if statement. (and since your substring is constant using whatever string primitives your language provides should be a better solution than regex)

If you really must do it the confusing way, /^(?:(?!substring).)*$/.

I think lookaheads are more than what Gatwick requires.

I'd wrap this in a function that replaces the substring, and returns true or false.