Answer the following questions: 1. What is understood by a word cluster? 2. What are the degree of
derivation in a word cluster? 3. What are the derivational relations in a word
cluster? 4. How are the derivational relations within a word cluster represented
graphically? 5. What part of speech do the derivatives of different degrees of
derivation in a word cluster belong to? 6. What is the difference between a word
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cluster and a word family? 7. What is the development of a word cluster in the
course of historical development of the English language?