Sentence:  If adjectival meanings show relatively low retentiveness of stems , as I am confident will prove to be the case in most languages of the world , why should our <WSD>basic</WSD> lists include 15 per cent of these unstable forms , but only 8 per cent of animals and plants which replace much more slowly ? 
Meaning of the word marked with <WSD> tags:  reduced to the simplest and most significant form possible without loss of generality