Sentence:  If adjectival meanings show relatively low retentiveness of stems , as I am confident will prove to be the case in <WSD>most</WSD> languages of the world , why should our basic 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:  the superlative of `much' that can be used with mass nouns and is usually preceded by `the'; a quantifier meaning the greatest in amount or extent or degree