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What is word?WORD is a unit of expressionthat has universal intuitive recognition by native-speakers,whether it is expressed in spoken or writ-ten form.It is agreed that three senses are involvedin defining“word”.1.1.1 Three sense of “word”(1). A physically definable unitWord may be seen as a cluster of sound segments orletters between two pauses or blanks as seen in thefollowing examples.ex.1-1Phonological:/It Is' wand f l/Orthographic:It is wonderful.(2)The common factor underlying a set offorms.ex.1-2listen listened listens listeningAll the four verb forms share the same root“listen”.Consequently. WORD is the common factorunderlying a set of forms,a unit of vocabulary,a