ملخص الدراسة:

This research deals with a general linguistic rule indicating that any emergent addition to a word or a sentence requires a change in the root of that word or sentence, and this change may in the diacritical marks, or in the ellipsis, or in the arrangement of the sentence elements.Arab linguists assume that this change is due to phonological, morphological, or grammatical causes; and they express this by many old and recent terms. As a conclusion, we have found that this change is not restricted only to the phonological, morphological, or grammatical levels, but it also occurs at the semantic level. The Arabic lexicon is full of examples which prove this.