Can keywords be excluded?

I was wondering if there's a way to exclude certain keywords or ebay categories.

For example, I'm using the keyword "harley" to display Harley related parts and accessories from ebay. However I'm getting some ads of clothing and occasionally comic books with the name "harley". I'd like to be able to narrow the search down to specific categories or even areas of ebay (i.e. ebay motors). Are there any variables I can use in the keyword string to exclude or narrow what is returned?

This is where you can designate what auction ads are displayed. The keywords you enter here will trigger relevant auction listings to appear. If you have a gadget blog you may want to enter, "cell phones", etc.

Use as few keywords as possible to achieve what you want. 2-3 is good. Only the first 15 keywords are considered.

Different sets of keywords can be separated by a semicolon (;). For example: you want to display ads for a HDTV or XBox 360, specify: "hdtv;xbox 360".

To refine a set of keywords down from a specific term, to a broad term, use ",". For example: "derek jeter rookie card, derek jeter, baseball". The ad engine will try to return results for each term, and refine to the broader terms as necessary.

That is from the tool tip thingie...

though I heard you can use the " - " to add additional limits...though I've not had a chance to play around with it yet.