As its name implies, Lexical Phonology (LP) is a two-sided discipline which is very much pervasive and of a priority for particular interest. It is basically a matter of the systematic correlation of both morphology and phonology as a preliminary to screening endless items and senses. Once postulated and covered with its linguistically theoretical frames, LP has proved attractive, useful and handful in that it turns up so often in such topics as lexical items with their phonological configurations and words with their stratum-based designs. The present paper is a painstaking scrutiny of how LP is thoroughly worked out to demarcate the lexical and phonological boundaries of Zubairi Arabic lexical items with a special reference to the linguistic behavior of affix attachments. It is no doubt a massive task – it is armed with such and such amount of systematization and provided with certain 'harmless looking terms and expressions that are frequently used. In attempt to focus on this point of interaction between phonology and morphology, the paper adopts the line of reasoning that is primarily based on a tabulated description and analysis of examples so as to serve the purposes of setting some comparisons, showing certain contrasts or governing particular rules of applications as far as Zubairi words and expressions are concerned. Among many results the paper has reached is evidently the one that the structure of Zubairi Arabic lexical items is the empirical "container" in which both phonological and morphological lines of representation are sometimes crossed very sharply or sometimes paralleled very endlessly whereby their blurriness may be relative and variable.