Sentence:  There are more stems per item in Athabascan , which expresses the fact that the Athabascan languages have undergone somewhat <WSD>more</WSD> change in diverging from proto Athabascan than the Yokuts languages from proto Yokuts . 
Meaning of the word marked with <WSD> tags:  (comparative of `much' used with mass nouns) a quantifier meaning greater in size or amount or extent or degree