Sentence:  And the more complex the morphophonemic system is in relation to the phonemic base , the less easily a phonemic system will be analysed without close attention to the <WSD>morphophonemics</WSD> - at least , the less satisfying will a phonemic statement be if it cannot be related through morphophonemic rules to grammatically meaningful structures . 
Meaning of the word marked with <WSD> tags:  the study of the phonological realization of the allomorphs of the morphemes of a language