Sentence:  M. Bergson's philosophy, unlike most of the systems of the past, is dualistic: the world, for him, is divided into two <WSD>disparate</WSD> portions, on the one hand life, on the other matter, or rather that inert something which the intellect views as matter. 
Meaning of the word marked with <WSD> tags:  Essentially different; of different species, unlike but not opposed in pairs; also, less properly, utterly unlike; incapable of being compared; having no common genus.