On Jan 25, 5:16 pm, Summercool <Summercooln... / gmail.com> wrote:
> somebody who is a regular expression guru... how do you negate a word
> and grep for all words that is
>
>   tire
>
> but not
>
>   snow tire
>
> or
>
>   snowtire

i could think of something like

  /[^s][^n][^o][^w]\s*tire/i

but what if it is not snow but some 20 character-word, then do we need
to do it 20 times to negate it?  any shorter way?