regexp command expr(?!test) assertion fail

While using regexp command in following example :

I am expecting result to be 'Retiring' 'lovable' 'runtastic' but instead I am getting the following result:

Can someone please explain why is it so?

Answer 1

[Walter Roberson]

Commencement matches \w* because it all word forming characters. It is followed by something that is not 'ment ' because the space after Commencement is not 'm'.

[Satyam Agrawal]

How can I correct it? Any ideas ?

[madhan ravi]

 regexprep(str, '.*(ment)','')

[Satyam Agrawal]

Thanks ! It works.