Sentence:  Link love is reciprocal; if you provide it liberally, it comes back to you. If you don't, you'll turn into your own <WSD>walled garden</WSD>. 
Meaning of the word marked with <WSD> tags:  A set of webpages or other resources that are richly interlinked and share a common focus, but have little or no linkage to or from the larger network.