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 <WSD>attention</WSD> to the morphophonemics - 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 process whereby a person concentrates on some features of the environment to the (relative) exclusion of others